Fundamental Directions of the Development of the Smart Cities Concept and Solutions in Poland

As city areas have been experiencing dynamic growth, the efficient development of cities is becoming a priority for technologically advanced countries and for states further down on the list from the global leaders. Smart cities are friendly for both people and the environment, in which life is better, safer, and healthier, the results of a creative approach to developing and implementing various innovations. Boasting sustainable and modern infrastructure and management, ecological city centres are perceived as key foundations of the future. Still, developing cities towards being “smart” is a serious challenge, not just for self-government and government administrators, but also for entities offering technical and technological solutions used for the purpose of implementing the improvements. The research objective was an attempt to indicate the expected changes in the shaping of the idea of smart cities in Poland. The authors’ own research was conducted from 2 August to 31 August. The method of focus group interviews with experts, specialists in the field of smart city, was used. Twenty-three practitioners participated in the study. The geographic area of the analysis covered the territory of the Republic of Poland. The time perspective of the study concerned the end of the current decade. The research process consisted of three stages: (1) preparation, the analysis of the literature on the subject (in which the variables selected for the study were identified); (2) the implementation of focus interviews; and (3) the analysis of the research results. In the last stage of the study, the statistical analysis and qualitative approach to responses were also used (by creating clusters). A network of relations, spanning a total of 3034 connections, was developed from the responses of experts on the fundamental development directions, beneficial factors, and adverse factors. On the basis of the research results, a SWOT analysis was prepared, containing the key beneficial factors, adverse factors, benefits, and disadvantages of smart city development. It was shown, on the basis of the conducted research, that the key development directions for smart cities in Poland by 2030 are: smart and sustainable buildings and infrastructure, smart mobility, and smart energy. The developed results of the analyses constitute an added value and can be used particularly in planning investments in intelligent solutions (identification of barriers and key development factors).


Introduction
The modern world is seeing the dynamic rise in the importance of cities as the main centres of life, where increasingly larger portions of the society live. It is estimated that the global city-living population is 3.5 billion and keeps growing. According to the forecast by the United Nations, around 60% of the world's population will be living in cities in 2030 [1].
Together with a significant rise in the number of people globally, technological advances have brought about highly dynamic changes as to how societies function. The main sites of interaction of these two, fundamental factors are the quickly changing cities and their characteristics [2][3][4].
It should be noted, however, that cities evolve and adapt to their inhabitants' changing needs, which often turn them into centres of innovation that support the development of countries [4]. The demographic growth and dynamic urbanisation, reinforced with globalisation processes and the unprecedented movement of people, capital, and information, pit cities against completely new challenges and require them to use new concepts of functioning, technologies, technical solutions, and development strategies [5].
The studies on the changes in the spatial and economic structure of cities point more and more to new development factors comprising, among others, advanced technologies that save time and energy, along with human capital and social capita, all immeasurably important in the development of cities. A modern city is not just its physical structure anymore, but also a massive network of cyber-links striving to optimise the city's resources and the processes of preventing negative external effects resulting from the city's functioning, in accordance with the principle of sustainable development [6].
The strategic role of cities in social and economic development and environmental issues of modern economies implies the necessity to undertake discussions and research on the vision and directions of urban development, not only in relation to the implementation of a new generation of information and communication technologies (supporting service inhabitants), but also in the context of generating and implementing ecological innovations (leading to a reduction in carbon dioxide emissions or the efficient use of resources energy) and modern social solutions. A response to contemporary problems (related to the achievement of the sustainable development) and the postulated direction of the development of modern city goals that is more and more popular both in Polish [7] and in the foreign [8] literature, is the concept of smart cities. The article is part of the discussions and scientific research relating to the fundamental directions of smart city development in Poland as well as the most important factors that imply planning and implementing intelligent solutions. It should be noted that a wide range of factors of a social, economic, administrative, environmental, and technological nature will be considered.
Smart cities use information and communication technologies. It should be noted that currently, technological solutions are often related to the legal aspects of user safety, confidentiality, and personal data protection. Local legal requirements for operating in the new technology sector encourage investment. Predictability, the standardisation of regulations with EU directives and regulations will allow for the planning of long-term technological investments in Poland [9] to ensure long-term economic growth, the efficient management of resources, and improved quality of life for their inhabitants. A smart city can use its advanced infrastructure to support local businesses, the environment, transport and mobility, health care, lifestyle, and management. The adoption of smart city solutions is driven by the rise in urbanisation trends all over the world and the desire to achieve a better quality of life. The key assumption behind smart cities is the creation of economic growth and the improvement in the quality of life by supporting the development of local areas and using technologies that lead to smart outcomes [2][3][4][5][6][7].

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The research objective was an attempt to indicate the expected changes in the shaping of the idea of smart cities in Poland. It should be noted that the authors perceive the development of the concept as well as the solutions relating to smart city as a composition consisting of relationships between the fundamental development directions, beneficial factors, and adverse factors. Therefore, the questionnaire for the focus interview included these three categories of variables, the importance of which was assessed by experts.

The Notion and Scope of Smart City
The contemporary, urbanised municipal areas never stop striving to ensure cohesion between social, economic, and environmental phenomena. The continuous improvement in processes and raising mobility via a sharing economy are priority issues in the age of universally growing urbanisation. The cities of the future must adapt to the changing environmental conditions to be able to rapidly react to climate changes, population sizes, the growing globalisation of economy and demographics, the development of technology, geopolitical dangers and changes, human mobility (including migration), the ageing of the population, conflicts, and social inequalities [10][11][12][13][14][15][16][17][18]. In their efforts to care for urbanised municipal areas and their users, municipal authorities are increasingly more often implementing the concept of a smart city. This concept is now becoming part of a strategic plan for numerous agglomeration in Poland, Europe, and worldwide [19].
The concept of a smart city is relatively new and arose as a result of an evolutionary process [20]. It should be noted that the concept of a smart city began to appear over time in various perspectives as a way to define urban technological changes. The first mention of this type appeared in 1997 as a virtual city and referred to the description of local ICT network initiatives that enabled the development of local cybernetic (virtual) communities [21]. Virtual cities relied on the World Wide Web (WWW) and acted as electronic counterparts of the real, material urban areas covered [20], which led to the digital city, that is, having an infrastructure for creating virtual communities [22].
In 2000, the smart city concept was defined as a city that monitors and integrates the conditions of its entire critical infrastructure including roads, bridges, tunnels, railway lines, subways, airports, seaports, communication, sanitary installations, energy, and even buildings for resource optimisation, preventive maintenance operation planning, and monitoring the safety aspect while maximising the quality of service for its citizens [23]. A decade later, it was pointed out that it was a city combining physical infrastructure, IT infrastructure, social infrastructure, and business infrastructure in order to use the city's collective intelligence [24]. As much as understanding a smart city as an aggregate of initiatives aimed at improving the efficiency of the functioning of urban centres through the use of data, information and information technologies (IT) to provide citizens with more efficient services, monitoring and optimisation, thus increasing cooperation between various economic entities and encouraging the implementation of innovative business models in both the private and public sectors [25].
Thus, one can indicate the evolution from a virtual city (in which an ICT network was created), the concept of which was quoted in the literature after the end of the 1990s [26], through the implementation of ICT at the level of entire metrology [27], for intelligent energy consumption, transport, and building management [5]. Then, the concept of the city's "smart footprint" was introduced, which is measured by means of indicators of the capacity (related to society, economy, mobility, governance) for large-scale testing of innovation-the city as a living laboratory [20]. In the latest approaches, the focus was on improving the quality of the everyday life of the inhabitants, sustainable development, the environment, mobility, and green zones [28]. Going with the definition by the Massachusetts Institute of Technology, a smart city is the new intelligence [that] resides in the increasingly effective combination of digital telecommunication networks (the nerves), ubiquitously embedded

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A creative population engaged in intensive activities using their knowledge or a cluster of such activities; • Effectively prospering institutions with their own procedures with regard to creating knowledge, facilitating its acquisition, adaptation, and continued development; • A well-developed broadband infrastructure, digital spaces, e-services, and on-line tools for knowledge management; • A documented ability to innovate, manage, and solve unprecedented problems because innovativeness and managing in uncertain conditions are crucial for evaluating intelligence.
One of the broader definitions of a smart city was proposed by the authors of a report titled Mapping Smart Cities in the EU [43]. Following this approach, a smart city is a city seeking to address public issues via ICT-based solutions on the basis of a multi-stakeholder, municipally based partnership. ICT serves to connect various municipal systems and stimulate innovations that facilitate the completion of municipal policy goals.
Using this class of solutions while securing social issues such as prosperity, cultural offerings, or life expectancy requires the adoption of a new, holistic city governance model where bottom-up governance works in accord with top-down governance, allowing the participation of multiple stakeholders (city users such as inhabitants, businesses, NGOs). The idea behind a smart city is to create and use relations and connections between human and social capital and ICT to generate the city's sustainable growth and to improve the quality of life of its inhabitants [2,10,29,[44][45][46][47][48][49][50][51][52][53][54][55][56][57].
It is assumed that a smart city is characterised by [14,43,[58][59][60]: • A competitive economy (smart economy), namely a highly efficient and technologically advanced economy due to the use of ICT; where new products and services are developed, along with new business models; one that fosters establishing local and global connections and the international exchange of goods, services and knowledge; • Smart transport networks (smart mobility) (i.e., integrated transport and logistics systems that mostly consume clean energy); • Sustainable use of resources (smart environment); a smart city manages its natural resources frugally; aims to increase the use of renewables; controls power and water networks, street lighting, and other public amenities in a manner allowing for the optimisation of environmental and financial costs of their operation; measures, controls, and monitors pollution on an ongoing basis; renovates buildings to reduce their power needs; • A high quality social capital (smart people), whose creation is possible in a diverse, tolerant, creative, and engaged society; • A high quality of life (smart living) translating into a safe and healthy life in a city with rich cultural and housing possibilities, with unobstructed access to ICT infrastructure that enables the creation of lifestyles, behaviours, and consumption; • Intelligent public governance (smart governance), where social participation in making decisions, also of a strategic nature, plays an important role in the transparency of actions, quality, and availability of public services; intelligent public governance facilitates the organisation and integration of the remaining elements of a smart city.
According to the National Health Organisation, by 2050, the number of people in the world will double and 70% of the whole population will inhabit cities. These cities grow by 60 million people annually, and their share in global GDP is systematically growing, which is currently at around 80%. This is related to the increasing demand for utilities (power, water, gas), transport services, and housing, with serious limitations in public space [2].
Consequently, cities need highly effective solutions that generate sustainable economic growth and social prosperity, which are reflected in the inhabitants' improved quality of life. Moreover, in the face of growing global warming and the instability of the global economy, cities have become the grounds of various social experiments, where the modern world's problems are being solved [15,79,80], of which a smart city is a good example.
Therefore, it is evident that the aspect of modern technologies is not the only element or feature of the term "smart" in the context of the functioning of municipal centres. Other factors resulting from these constituents are difficult to grasp factors such as creativity, innovativeness, or democrativeness. The modernistic vision of an ideal city, predominantly based on the individualism of people, is currently in retreat, at an increasing intensity.
Additionally, a fundamental role in the context of the development of the cities of the future is played by business, namely companies introducing smart solutions in the public area, in people's homes, and lives. These may be organisations that mainly use the technology, creativity, and access to open data, but also human needs, which create software that improves the quality of life, increases work efficiency, while at the same time filling the gap between a city and traditional business in creating social innovations. Another type of business is producers of hardware and software that increase energy efficiency, are based on smart algorithms (e.g., smart homes), and those that supplement smart grids (i.e., power solutions that aim to minimise power losses) [2].
It should be noted that using the market aspect, it is possible to estimate the value of investments that, in the coming years, will be made in the broadly understood smart city solutions and technologies. The analyses can be found in the next section.

Analysis of the Market of Smart City Solutions and Technologies-Global and European Dimension
The market of smart city solutions and technologies comprises the following components: appliances, software, services, and the functional area (smart infrastructure, governance, education, energy, mobility, health care, buildings). Based on the Allied Market Research data, this market's value should increase from USD 648.36 B in 2020 to USD 6061.00 B in 2030 (Figure 1).
A report by Research and Markets presented similar values for 2020-2026. According to these data, by 2026, the value of the smart city solutions and technologies market will grow from USD 741.60 B to USD 2500.00 B. On the basis of the authors' own forecast employing exponential smoothing (Section 3, Materials and Methods), the market's value will increase to USD 4282.67 by 2030 ( Figure 2).
A report by Research and Markets presented similar values for 2020-2026. According to these data, by 2026, the value of the smart city solutions and technologies market will grow from USD 741.60 B to USD 2500.00 B. On the basis of the authors' own forecast employing exponential smoothing (Section 3, Materials and Methods), the market's value will increase to USD 4282.67 by 2030 ( Figure 2). Addressing the global revenues from smart city technologies, products and services, their value, following the data published by Statista, should increase from USD 116  Research data, this market's value should increase from USD 648.36 B in 2020 to USD 6061.00 B in 2030 ( Figure 1). A report by Research and Markets presented similar values for 2020-2026. According to these data, by 2026, the value of the smart city solutions and technologies market will grow from USD 741.60 B to USD 2500.00 B. On the basis of the authors' own forecast employing exponential smoothing (Section 3, Materials and Methods), the market's value will increase to USD 4282.67 by 2030 ( Figure 2). Addressing the global revenues from smart city technologies, products and services, their value, following the data published by Statista, should increase from USD 116  Addressing the global revenues from smart city technologies, products and services, their value, following the data published by Statista, should increase from USD 116.35 B in 2020 to USD 241.02 B in 2025. Additionally, according to the authors' own forecast (conducted using exponential smoothing-Section 3, Materials and Methods), it is estimated that their value will grow to USD 369.52 B in 2030 ( Figure 3).
Addressing the European data, according to Research and Markets, the market's value will grow, in 2020-2030, from USD 214.44 B to USD 1013.31 B (Figure 4). (conducted using exponential smoothing-Section 3, Materials and Methods), it is estimated that their value will grow to USD 369.52 B in 2030 ( Figure 3). Addressing the European data, according to Research and Markets, the market's value will grow, in 2020-2030, from USD 214.44 B to USD 1013.31 B (Figure 4). It is worth noting that within a decade (in the period from 2020 to 2030), the value of the global market of smart city solutions and technologies will increase by 834.82% (based on data from Allied Market Research). On the other hand, based on the research of Research and Markets and the authors' own forecast, this increase will amount to 477.49%. Therefore, it is possible to point to a significant dynamics in this sector. (conducted using exponential smoothing-Section 3, Materials and Methods), it is estimated that their value will grow to USD 369.52 B in 2030 ( Figure 3). Addressing the European data, according to Research and Markets, the market's value will grow, in 2020-2030, from USD 214.44 B to USD 1013.31 B (Figure 4). It is worth noting that within a decade (in the period from 2020 to 2030), the value of the global market of smart city solutions and technologies will increase by 834.82% (based on data from Allied Market Research). On the other hand, based on the research of Research and Markets and the authors' own forecast, this increase will amount to 477.49%. Therefore, it is possible to point to a significant dynamics in this sector.  It is worth noting that within a decade (in the period from 2020 to 2030), the value of the global market of smart city solutions and technologies will increase by 834.82% (based on data from Allied Market Research). On the other hand, based on the research of Research and Markets and the authors' own forecast, this increase will amount to 477.49%. Therefore, it is possible to point to a significant dynamics in this sector.
It should be noted that the application of solutions and technologies related to smart city projects will grow in both the global and European setting. However, major differences in the level of advancement of the implemented smart city solutions exist. The following section presents the analysis of the level of Polish smart cities against the background of the world's leading units of such type.

Polish Smart Cities on the Background of Global Leaders
The increasing popularity of the smart city concept is reflected in the actions of numerous municipal authorities worldwide. At the same time, the level of advancement and scope of implementation of smart solutions into municipal structures differs on international, domestic, and local levels alike.
The comparative analysis of Polish smart cities and the global leaders was conducted on the basis of a report by the IMD-SUTD Smart City Index (SCI), which comprises a multicomponent and multi-criteria cumulative list of variables taken into account for evaluation and ranking purposes. It is also worth describing the methodological assumptions created by the authors of the report [85].
The evaluation covers the way the inhabitants perceive issues related to the structures and technologies they have access to in their respective cities. The most recent publication (2021) covered 118 cities worldwide and recorded the opinions of 120 inhabitants in each city. The final score for each city was calculated using the perception for the last three years, using the weight 3:2:1 for 2021:2020:2019. Smart city parameters were evaluated on the basis of two pillars [85]: • Structure pertaining to the infrastructure existing in the cities; • Technological, which describes the technological solutions and services available to the inhabitants.
Each pillar was evaluated within five key areas: health and safety, mobility, activities, possibilities, and governance. Cities were classified into four groups based on the United Nations Human Development Index (HDI) of the economy of which they were a part of. Scoring (AAA to D) was assigned to the cities in each HDI group, on the basis of the perception score of a given city in relation to the remaining cities in the same category [74]: The ranking lists were then presented in two formats: a general ranking (from 1 to 118) and a score for each pillar and the entirety. The three top scoring cities were considered, along with two Polish cities from the ranking list (a total of five cities).
Singapore was ranked as the first city, followed by Zurich and Oslo. The Polish cities were ranked as: 75-Warsaw and 80-Krakow (Table 1). Addressing the factors related to a city's infrastructure, both Warsaw and Krakow had much lower values of components of factors. Still, some areas were identified to be at a similar level such as public transport, cultural activity, life-long education possibilities offered by administrative units, or the possibility to participate in the decision-making process of self-government projects ( Table 2).
With regard to technology related factors, the ranked Polish cities achieved much higher scores, often approaching those of the world's leaders. This can include a website or an app that allows the inhabitants to monitor air pollution, arranging medical services online, renting municipal bicycles, purchasing city transport tickets online, access to job offers, and information on how to commence business activity, online voting, using an online platform to communicate with the inhabitants, or the time needed to verify documents online (Table 3).  It is worth noting that inhabitants of Warsaw and Krakow used non-cash payment options more often than people who lived in Singapore or Zurich. However, their willingness to make available their personal data in order to reduce traffic congestion or improve the availability of information was lower, as was the trust they put in authorities (Table 4). The last element subject to evaluation was the selection of priority areas by a city's inhabitants (the sample was 120 individuals for each city). Those surveyed were asked to choose five factors, out of a list of fifteen factors, that they deemed the most urgent for their respective cities. It should be noted that the issue of affordable housing received high scores in practically all of the analysed cities. It should be noted that the indicated cities with the highest rating, compared to Polish smart cities, were characterised by a completely different situation. Among other things, Polish cities, in particular, have a problem with air pollution, urban traffic, and health services. In connection with the above, one can expect the development of intelligent solutions, precisely in the direction of solving these problems (Table 5). The Polish smart cities were not among the world's leading cities of that type, according to the conducted analyses. Still, the selected areas, comparable in their development to those in the top ranked cities, should be acknowledged. This state of affairs proves that there is a significant growth potential that can be utilised in the coming years. It is therefore justifiable to conduct analyses as identifying fundamental development directions is important. These considerations are discussed in the following section.

Smart City Technologies and Solution
The concept of a smart city allows for a multi-faceted approach to the development of urban centres. It assumes both an intelligent, sustainable way of managing them as well as the use of so-called smart technologies in urban space. These include [86]: • Intelligent roads: Equipping roads with special sensors, robots, and other elements aimed at improving the comfort of driving a car; the use of heating elements can prevent freezing of roads, while the use of nanotechnology and self-healing materials keep roads in good condition; sensors will also be able to generate information to engineering services about problems with the surface and places requiring renovation; • Waste management: The technology assumes the placement of sensors in waste containers that constantly monitor the level of filling the garbage cans; on the basis of information from sensors, the most optimal route of garbage trucks is created, which only considers full bins; • Monitoring of green zones: Measuring the condition, temperature, and microclimate of the soil can optimise the irrigation and spraying of crops, which will contribute to maximising the quality and production of cereals, vegetables, and fruits; monitoring of exhaust gases and identifying exhaust conditions in forests will define fire zones and avoid the spread of fires; ongoing monitoring of tap water quality as well as the detection of chemical leaks in rivers, • Intelligent parking lots: Sensors in parking lots in city centres allow drivers to plan parking before they set off; • Intelligent lighting: Remote management of lighting in the city, where individual lamps can be turned on, turned off, or dimmed to a certain level at any time, depending on the time of day or season as well as during scheduled events taking place in the city; • Internet of Things in buildings: Sensors located in buildings can monitor the technical condition of building elements as well as the condition of materials; thanks to the use of machine learning techniques and the use of predictive analysis, it is possible to estimate when the next failure will occur; real-time data delivery allows lifts to be repaired before a major failure occurs; • Location and geolocation: Solutions of this type may, for example, apply to navigation systems inside buildings; • Intelligent transport systems: A series of solutions that are designed to automatically adapt to the current traffic volume, season, day, and infrastructure. These are, for example, intelligent traffic light systems as well as road safety monitoring, road lighting regulation, or electronic payment management in urban transport.
L.G. Anthopoulos defines the following elements of the architecture of smart cities [20]: Thus, it can be concluded that the implementation of smart city technologies and solutions can take place at the following levels [20]: • Layer 1-Environment: Respect for all features of the environment in which the city is located; • Layer 2-Hard infrastructure (non-ICT based): Includes all urban facilities (i.e., buildings, roads, bridges, power, water, sewage, etc.); • Layer 3-Hard Infrastructure (ICT based): This applies to all hardware with which intelligent services are created and delivered to end users (i.e., data centres, telecommunications networks, IoT, sensors, etc.); • Layer 4-Smart Services: Smart services offered through hard and soft infrastructure (i.e., smart security, intelligent transport, smart management, smart water management, smart health, smart tourism, smart education, smart energy, smart buildings, etc.); • Layer 5-Soft Infrastructure: People and groups of people living in the city, business processes, applications, and data by means of which intelligent services are implemented.
With regard to intelligent technologies and solutions used in Polish cities, it is worth mentioning Warsaw and Krakow. Warsaw is one of the most developed smart cities in Poland. Among the already available solutions, it is worth mentioning the Veturilo bicycle rental network, Targowa Creativity Centre, the launch of the Warsaw Air Index, and the creation of the Intelligent Heating Network. The solutions are also intended for tourists, elements of electromobility are being implemented, and there is a platform with open access to data. In the case of Krakow, the Intelligent Transport System is used. Within its framework, the following are used: Tram Traffic Supervision System, which enables the management of tram routes in the event of, for example, possible breakdowns; boards with current information. An Area Traffic Control System was also used. Pedestrian and car traffic has been optimised. An Intelligent Lighting Control System was also implemented. The Municipal Spatial Information System is used, which provides the most important information about Krakow, and residents can submit their comments about greenery through it [87].

Fundamental Development Directions, Beneficial Factors and Adverse Factors of Smart Cities in Poland
Globalisation allows one to observe processes of knowledge diffusion, permeation of models of functioning of city spaces, hybridisation of applied solutions, and the rise in importance of bottom-up (community) initiatives in the co-creation of city spaces [88]. Polish cities are now facing numerous changes that are stimulated by external and internal mechanisms. Consequently, the simultaneous presence of various fundamental directions that can shape smart cities can be brought to attention.
C. Crowe lists the following directions and phenomena that will soon shape the undertakings and projects related to smart cities [89]: • Technology and innovative data analysis solutions will help fill the digital gap; • Cities will implement technologies and policies to mitigate issues related to congestion and pollution caused by the increased activity of utility vehicles; • City centres will be leaders in activities aiming to mitigate climate changes; • The closed-loop economy concept will be widely used in transport; • Cyber-security and anti-ransom system will be extended; • Technological advances will stimulate the building of civic participation; • Cities will modernise their infrastructure to become more resilient to unpredictable events that may have major, destabilising effects on their functioning; • Shared mobility using low-emission technologies will grow; • The creation and extension of the infrastructure for e-car chargers; • Wireless power supply of infrastructure and buildings will reduce the cable system and maintenance costs, but will also allow consumers to power smart homes and personal gadgets; • Public libraries should become centres for rebuilding communities (and even perhaps for the return of civic discourse), the development of workforce and entrepreneurship, and for positive changes and social advancement.

Development Direction Description
Green planning of public spaces Cities will be planned and designed focusing on humans, with "green" streets, new corridors, and public spaces serving as social life centres. Among others, the aim is to increase the number of trees in cities and more facilities for pedestrians and cyclists, solutions fostering closer contact with nature Smart health communities in cities Cities will be developing health care eco-systems that not only focus on diagnosing and treating diseases, but also on supporting human well-being through early intervention and prevention, with the use of digital technologies. The health crisis during the pandemic has made it all clear: communities play a role in creating better health environments and cities must pay more attention to their inhabitants' well-being (up to a half of deaths globally is estimated to be connected with unhealthy lifestyles).

15-min city
Cities will be designed so that amenities and most services are located within a 15-min walk or bike ride, thus creating a new approach to neighbourhoods.

Mobility: smart and sustainable services
Cities will offer digital, pure, smart, autonomous. and intermodal mobility, with more space allocated for pedestrians and cyclists, with transport commonly offered as a service. It is worth noting that transport will be accelerated thanks to electrification, autonomous driving, smart and connected infrastructure, modal and mobile diversity, which is also resilient, shared, and sustainable.

Inclusive and planned services
Cities will evolve to offer integrating services and approaches, combating inequalities by offering access to housing and infrastructure, equal rights and participation, along with jobs and possibilities.

Development Direction Description
A city as an eco-system of digital innovations Cities will attempt to draw talent, foster creativity, and destructive thinking; they will be growing thanks to an innovative model approach and by combining physical and digital elements. The approach to innovation will become multi-dimensional and will combine social, scientific, environmental, administrative, and industrial potential.
Closed-loop economy and local production Cities will assume a closed-loop model; principles of making things available, re-using, and restoring them; and a focus on limiting municipal waste and on local production (e.g., city farming).

Smart and sustainable buildings and infrastructure
Cities will seek to regenerate buildings and to use data to optimise energy consumption, use, and manage resources in buildings and utilities: waste, water, and energy.
Mass participation in the construction and development of a city Cities will be oriented towards their inhabitants (the human) and designed by and for its citizens by promoting widespread participation in the process of cooperation and observing the policy of open governance.
AI-supported municipal operations Cities will adopt automated processes and operations (organised by a city platform) and will follow data-based planning approaches.

Cyber-security and privacy awareness in a city
Cities will promote the awareness of the importance of data privacy and prepare for cyber-attack effects because data will be an important, municipal commodity.
AI-predicted supervision and policy Cities will use AI to ensure security for its citizens, at the same time protecting privacy and basic human rights.
F. Salva lists five fundamental directions that will have key importance in the context of the development of a smart city [96]: • Smart health: Technologies will reduce the burden on healthcare eco-systems by supporting not only diagnostics and treatment, but also preventative self-care. This will shift the centre of gravity from health care that focuses on an individual, to a community model. Driven by data analysis, health care will be adapted to the needs of individuals and their families; • Smart security: Biometrics, facial recognition, smart cameras, and video supervision are growing in popularity as their use by various services and state administration is intensifying. These technologies will assist cities in identifying patterns in data on crime, shorten reaction times, and analyse crime forecasts; • Smart energy: Apart from investing in clean energy, a city will use technology to monitor energy consumption in real-time and to optimise it; • Smart infrastructure: Innovative technologies will improve the existing interfaces in several ways from green buildings, through waste management systems, to traffic control; • Smart citizens: New technologies reinforce a city's communication with its inhabitants, allowing them to promptly report local problems, while social platforms facilitate establishing connections and sharing resources. Thanks to this, cities will focus on humans and their needs.
Ten key directions related to smart cities can be designated when citing another cumulative list compiled by StartUS (Table 7). Table 7. A cumulative list of smart city fundamental development directions-StartUS Insights' view [97].

Development Direction Description
Smart mobility Municipal mobility developments are connected with improved infrastructure, mobility as a service, micro-mobility, logistics solutions, and zero-emission transport. Smart traffic management, advanced commuting, and autonomous vehicles will make municipal mobility environmentally friendly.
Innovative transport options such as hyperloop, robotaxis, and water taxis will be also a part of smart, municipal mobility.

Development Direction Description
Digital citizen The digital citizen focuses on increasing the involvement of citizens, a community based on cooperation and access to health care and education. Integration services ensure equal rights for civic participation and career opportunities. In the education sphere, remote and personalised learning will foster wider access to education all over the world. AI-based health care eco-systems will also offer early prediction and preventative measures based on data-driven findings, with particular focus on supporting the elderly.
Public safety and security Digitisation will improve public safety by assisting citizens in combating crime and coping with crisis situations faster and more effectively. Big data and artificial intelligence will facilitate the implementation of critical, municipal solutions such as supervision systems, smart street-lights, real-time crime mapping, and predictive police policy.

Smart energy
Reliable, efficient, and environmentally friendly energy supplies are one of the main goals of smart cities. Connected IoT solutions will improve energy management by making it possible to take data-based decisions for improved energy storage and distribution.

E-governance
Public services and decision-making will become an open, transparent, and sustainable process based on collaboration. Blockchain and IoT based solutions will be used so that all stakeholders can take part in the decision-making process. Digital services such as online voting, digital passports, and robust data security tools will encourage citizens to participate and will boost e-democracy.

Green urban planning
Given the changing climate, urban planning is facing a serious challenge of making cities smart, sustainable, and resilient. Following decarbonisation goals, green urban design incorporates aa sustainable neighbourhood approach and 15-min city models, where most daily needs can be reached by walking or cycling.

Advanced waste management
Advanced waste management systems will use IoT sensors for accurate monitoring of waste removal, informing inhabitants about their waste generation, and encouraging them with a system of benefits. AI recycling robots will precisely identify the type of material when segregating waste, leading to improved efficiency thanks to avoiding human work.

Smart buildings
Technologies such digital twins, smart sensors, and cloud computing allow for real-time monitoring, energy consumption forecasts, identify security threats, and optimise expenses and will be incorporated in modern construction.

Advanced water management
The growing demand for improved water supply systems is driven by global warming and the resulting droughts. This leads to the development of smart tools and appliances for wireless measurements, providing inhabitants with hourly water consumption data, leading to increased awareness and reduced costs. Additionally, structural flow technology will dynamically react to changes in water levels, consequently leading to a higher variety of aquatic life on riverbanks.

Smart farming
The latest technological innovations in IoT, robotics, and data analysis will support managing farms, crops, and work optimisation.
Moreover, M. Pavlica identified seven key directions related to the development of the smart city concept [98]: • 5G ubiquity-Very soon, 5G networks will become common in cities and will greatly boost the speed of digital transformation. New generation cellular networks will boost the evolution of technologies such as IoT, deep learning in network edge, or detailed data analysis. Support for significantly more 5G devices will allow cities to collect more information and analyse them in real-time, leading to improved efficiency (e.g., in the area of public security or municipal mobility); • The need for data protection-As technology is gaining popularity, the amount of data is growing. Consequently, cities that implement smart technologies will have to satisfy growing expectations with regard to providing better protection to the information on their inhabitants; • Combating cyber-crime-The growing problem of cyber-crime forces cities to look more closely into ways of protecting municipal systems. Many places still lack action plans that would describe how to react to cyber-attacks on municipal services and infrastructure; • Nearing the edge-The ongoing digitisation of cities reinforces the need to store and analyse data collected from network edges, which is where sensors, cameras, and other smart appliances are located. Municipal authorities have already noticed the many benefits originating from deep edge analyses and are eagerly introducing modern solutions in road traffic management, light control, flood protection, etc. • Municipal mobility-As the number of inhabitants grows, so does the number of vehicles on the streets. This necessitates the introduction of smart and sustainable solutions that reduce city traffic and are, at the same time, environmentally friendly; • Reaction to climate changes-Climate changes belong to the most serious challenges that today's cities face. Extreme weather conditions, rapidly ebbing rivers, and dwindling water resources have had an unprecedented impact on urbanised areas. Aiming to limit their impact on the environment, smart cities have been setting increasingly eco-friendly goals and introducing technologies for monitoring threats and the impact of extreme weather. Solutions such as air quality analysis, energy consumption optimisation, water level monitoring, and waste management are being introduced. • Smart, post-COVID cities-The COVID-19 pandemic has altered the priorities of city planners because the coronavirus managed to reorganise numerous aspects of daily life. In reality, we now have access to and can use smart solutions that prevent the virus from spreading. In the future, city authorities will have to implement smart systems that allow them to get ready to the next, potential pandemic, or maybe even prevent it altogether.
Apart from the fundamental directions present in the surroundings (both far and near) of city centres, there are specific factors that, on one hand, may stimulate and, on the other one, hinder the growth of smart cities. Referring to the studies by L. Lsa and S. De Azambuja [99], a wide range of factors can be distinguished that should support the implementation of intelligent solutions and technologies in cities (see Table 8).  Some of the most important drivers are innovative health care and sanitation facilities, community collectivism, volunteering networks [100][101][102][103][104][105][106][107][108][109], social capital management, ensuring skilled workforce, orientation at renewable energy sources [110], closedloop economy, transparency of governance and actions of public and governmental administration [111,112], and the use of modern technologies related to the functioning of municipal infrastructure [113,114].
There are also numerous adverse factors that include, among others, the citizens' distrust in administrative and government authorities [115,116], the costs of functioning and modernisation of infrastructure, climate changes, ineffective transport system, centralised decision-making process, and the use of obsolete technologies [117]. The cumulative list of adverse factors for the development of smart city concepts and projects is shown in Table 9. Table 9. A cumulative list of the smart city development barriers [99,118].

Categories
Adverse Factors

•
The rise in the number of inhabitants of cities, which forces specific actions aiming to organise spaces in a way that allows for their optimal utilisation; new needs emerge with regard, among others, to equip public spaces with web infrastructure, creating transfer nodes, rebuilding the communication framework, and introducing smart street traffic management; • Increased interest in sustainable development; self-governments face a new challenge of limiting energy use and CO 2 emissions; • Ongoing computerisation of the life of communities; more and more people from various age groups have been using new IT technologies that facilitate communication, but also allow making online payments or searching for information; therefore, public services must be computerised even more; the traditional model of administration based on providing services to stakeholders via personal contact should be gradually replaced with ICT tools.
At the same time, the cited authors formulated the following list of adverse factors for the use of the smart city concept among Polish cities [10]: • A difficult financial situation mainly caused by investment activities in the recent years; consequently, new projects in areas where the most capital is needed, namely in transport, power engineering, and waste management, may be limited or postponed; • The tenure nature of governance, which may negatively affect the strategy selected by predecessors; the political risk constitutes a barrier that is difficult to overcome as it makes it necessary to build alliances with disregard to the differences, political party affiliation, and personal antagonisms; it is important that the city and its inhabitants remain the ultimate goal; the proper satisfaction of public needs with the use of new tendencies and proven solutions should remain the foundation of city governance; • Lack of awareness of recipients with regard to the rational use of utilities; the task of the local authorities would have to be the creation of a conscious consumer approach, an individual who uses power, gas, and water during periods that guarantee lower bills, and eliminate the risk of grid overload; • Resistance towards changes; it is a society's natural reaction; therefore, the introduction of new, municipal solutions should be preceded by widely reaching information campaigns and consultations, so that arguments for the viability of the made decisions can be presented; it is important that all improvement actions are taken regularly; the nature of innovations is the continuity; the regularity of introduced changes may alleviate social resistance and motivate inhabitants to accept new solutions.
It should be noted that the conducted analyses point to a wide range of factors and variables that may prove to be beneficial to the development of smart city projects, but may also limit them. Additionally, given the specific nature of domestic and local conditions, it is reasonable to conduct inquiries that aim to determine the key tendencies and factors that may shape smart cities. The next section describes the methodological assumptions behind the authors' own studies.

Conceptual Assumptions
The research objective was an attempt to indicate the expected changes in the shaping of the idea of smart cities in Poland.
In the context of creating smart city concepts and solutions, fundamental development directions will be analysed, which are related to two categories of factors: beneficial and adverse. The study used a variety of methods depending on the phase (analysis of the literature on the subject, the implementation of the study, and the elaboration of the results). Below is a description along with an indication of their use in individual stages of the study.
As part of the study, a number of methods were used depending on the stage of the study (preparation, implementation, and results processing).

Research preparation phase
The authors formulated the following research problems: Desk research is a research method consisting of the analysis of available sources of data and, in particular, their compilation, mutual verification, and processing. This analysis serves as a basis to draw conclusions on the researched problem [119,120]. The method was used in the analysis of the literature on the subject and the selection of variables (fundamental development directions, beneficial factors, and adverse factors) to develop a form for focus expert research.
Exponential smoothing method consists in the processing of a time series and reduces its variance thanks to a weighted moving average from previous values, where weights diminish exponentially along with the distance in time [121]. It should be noted that exponential smoothing and its modification allows for the extrapolation of trends (the smoothing removes noise and other effects, leaving only the signal), making it possible to predict the series behaviour in the near future [122]. Depending on the conclusions drawn from the decomposition of the series, a relevant method of exponential smoothing is subject to adaptation [123]. The analysis uses exponential triple smoothing, ETS, with three additive model components such as error, seasonality, and trend (AAA algorithm). Excel was used for the calculations. The examined variables were the time and values pertaining to smart city solutions and technologies. To show the trends in the implementation of smart city solutions and technologies, the market data (global and European) relating to this sector was presented (Section 2.2 Analysis of the market of smart city solutions and technologies-global and European dimension). For two reports from the following sources Research and Markets [82] and Statista [83], the authors prepared a forecast up to 2030 in terms of market value. The forecasting function in Excel (FORECAST.ETS) was used for the calculations.
Research implementation phase Expert focus group interview (expert questionnaire) is based on collecting research material using a developed questionnaire form, obtaining answers by the researcher from research participants selected on the basis of specific criteria.
It should be noted that an expert interview is a special type of method as it draws from the knowledge and ingenuity of individuals who are experts in a given field [124]. The questions given to the respondents in focus interview not only pertain to facts or attitudes to them, but also to attempts at explaining and predicting them. Additionally, it is assumed that professionally accomplished respondents who have expert knowledge on a topic can offer interesting analytical proposals. Thanks to their professional knowledge and "reality-based imagination", they can also create valuable (realistic) forecasts as to the development of a situation within a specific part of economic and social reality [125,126]. The authors' own research was conducted from 2 August to 31 August 2022. The criteria for selecting experts for the study are described in the next section.

Results analysis phase
The analysis of the test results is based on two parallel analytical paths. The first was based on the statistical method. The second, on the other hand, was carried out on the basis of the network analysis method.
On the one hand, the statistical analysis included descriptive measures such as arithmetic average, dominant, minimum value, maximum value, and range [127]: The dominant (D) is the value of the variable that is the most frequent (dominant, typical) in the studied community. The dominant is called a modal value or mode. In a simple series, the values of the variable should be ordered from the lowest to the highest value (i.e., from x max to x min ) and then the values that repeat themselves are counted; • The minimum value of recorded responses in accordance with the adopted scale x min ; • The maximum value of the recorded responses in accordance with the adopted scale x max ; • The range is the difference between the maximum and minimum value x max − x min ; • The intraclass correlation coefficient (ICC) is a descriptive statistic that is used in quantifying individuals that are organised into groups. It is used when the test variable is measured by several experts. It measures the strength of expert reliability (i.e., the degree to which their assessments agree intervals were based on an absolute-agreement, 2-way random-effects model. The single measure option was chosen for the fundamental development directions (as no general indicator was built for those items) and average measure option for beneficial and adverse factors (as they were later on averaged for other computations).
Based on the value of the dominant estimated for individual factors, the responses were grouped (clustered), taking into account the inclination of the experts' assessments.
Correlation coefficients used in the analysis were Pearson's r and Spearman's rho. Pearson's linear correlation coefficient (r xy ) is a descriptive measure that determines both the strength and direction of the correlation relationship between two quantitative features X and Y when the relationship between them is linear. Pearson's correlation coefficient is based on the so-called feature covariance-cov(xy). The Pearson's correlation coefficient is calculated as: r xy = cov(xy) where x i is the X feature value, y i is the Y feature value; x is the arithmetic average of the X feature; y is the arithmetic average of the Y feature; S(x) is the standard deviation of the X feature; S(y) is the standard deviation of the Y feature [127].
Spearman's rank correlation coefficient (r s ) is used to describe the strength of correlation of both the quantitative and qualitative features in a situation where it is possible to order their variants. The formula for calculating the Spearman rank factor can be written n(n 2 −1) ; where d i is the difference between the ranks of the feature X and Y; n is the number of pairs of X and Y features. Ranking consists of arranging the values of X and Y features in ascending or descending order, then, they are given the so-called ranks: 1, 2, 3, . . . , n [127].
Network analysis is based on the identification and description of relations (relationships) between groups, both organisations (or their components) and people [128]. It can be said that this is an interdisciplinary approach using, inter alia, statistics, matrix algebra, graph theory, informatics, and the assumptions of sociology, anthropology, and social psychology, focusing mainly on the structure of relationships between social entities (factors, components of organisations, organisations, and even regions and others). Network analysis is practically used (mainly in analytical processes) in management and quality sciences, on a pan-organisational level including interregional areas [129,130].
The following network analysis indicators will be used in the article's research part: • Betweenness centrality, a relation of the number of the shortest paths between any two nodes, which pass through a given node, to the total number of all shortest paths; betweenness is sometimes normalised so that the maximal betweenness in the network is 1; it shows which nodes are the most important ones, in other words, it determines the probability of a given factor (element) being key for the entirety of flows within a network; • Cumulative value of a vector, the summed values of all connections from a given network node, it parametrises the scope of impact of a given factor on flows in the network.
Network analysis makes it possible to assess the structure of the network by analysing other levels of connections, identifying gaps in the structure, emerging subgroups linked by specific recurrences, and also identifying the importance of individual factors in the studied socio-economic processes [128]. Thus, such a research approach includes both quantitative and qualitative appetites-the collected data are subject to qualitative interpretation [131]. In this study, the analyses and visualisations were based on the Pajek program, which was developed by V. Batagejl and A. Mrvar [132], thanks to which, the relations and interactions between the assessments made by individual experts participating in the study were reflected.
The article serves as a continuation of the cycle of experimental examinations on the use of Pajek as an auxiliary tool for the creation of a concept of solving specific problems of businesses and sectors on the basis of relation systems within the environment's phenomena [133,134]. SWOT analysis is one of the strategic methods and is a heuristic method. Its name is an acronym for strengths, weaknesses, opportunities, and threats. The method has many applications; in this study, it was used to aggregate the results into the following (modified) categories: key beneficial factors of development, key adverse factors of development, benefits of smart city development, and the disadvantages of smart city development.

Selection of Experts for the Research
The technique of purposeful selection of the research sample was used. The selection criteria for the study were extensive practical experience in the field of smart city solutions and concepts, manifested by participation in the development of strategic assumptions for smart cities, international projects related to the implementation of smart city technology, and the development of policies for the development of the smart city concept at the European Union level. Twenty-three experts participated in the study. Due to the focus of the study, the number of participants was not selected to be representative, which is a limitation. However, due to the importance of expert opinion(s), a significant added value of the research results can be indicated.

Tool Description
The tool used in the study was an expert focus interview form (in electronic form-Computer Assisted Web Interviewing, CAWI), where the following issues were discussed:  −1: Mild, the factor will have little impact on the development of smart city concepts and solutions in Poland by 2030; −2: Average, the factor will have a significant, but not crucial impact on the development of smart city concepts and solutions in Poland by 2030; −3: Strong, the factor will have a strong, crucial impact on the development of smart city concepts and solutions in Poland by 2020.

Analysis Scheme
The study consisted of three phases: preparation, implementation. and results analysis. The results of the analyses were developed in parallel based on two approaches: the statistical method and the network analysis ( Figure 5).

Results
The focus interview was conducted from 2 to 31 August 2022. The research material was collected using an expert survey form consisting of parts on the evaluation of the fundamental development directions, beneficial factors, and adverse factors.

Desk research
Exponential smoothing method  The network in the Pajek program was created in two main stages (after collecting the research material). First, all of the analysed elements (variables) were entered. In this case, the element was divided into the following categories: symbols of experts, trends, factors, and barriers to development (divided into social, economic, environmental, governmental, and infrastructural subgroups). In the second stage, the relationships between the components of the network were defined. Therefore, on the basis of each of the 23 questionnaires, relations between the expert and the answers indicated by them were introduced. The direction of the relationship was from the expert to the element (trend, factor or barrier of development) with the strength of this relationship (according to the adopted scale).
On this basis, it was possible to select the most important elements of the network using the two factors described above: the cumulative value of the vector and the intermediation. The first indicator shows the total value of relations entering a given network element where the higher the value, the more often it was indicated by the experts or obtained higher values on the rating scale. On the other hand, the second indicator determines the key level of network elements where the higher its value, the more important a specific network element is in it. Therefore, on the basis of these two indicators, it is possible to identify the main reasons for the studied phenomena.
The analysis of the results of the authors' own research is presented in the following section.

Results
The focus interview was conducted from 2 to 31 August 2022. The research material was collected using an expert survey form consisting of parts on the evaluation of the fundamental development directions, beneficial factors, and adverse factors.
The research sample consisted of 23 experts. Regarding the function, the biggest share included specialists (34.78%), followed by managers (21.74%), and department heads (17.39%) ( Figure 6).  It should be noted that the participating experts had ample experience in their respective functions, with most of them indicating over 5 years of experience (52.17%), from 3 to 5 years (34.78%), and from 1 to 3 years (the remaining 13.04%) (Figure 7)  It should be noted that the participating experts had ample experience in their respective functions, with most of them indicating over 5 years of experience (52.17%), from 3 to 5 years (34.78%), and from 1 to 3 years (the remaining 13.04%) (Figure 7). It should be noted that the participating experts had ample experience in their respective functions, with most of them indicating over 5 years of experience (52.17%), from 3 to 5 years (34.78%), and from 1 to 3 years (the remaining 13.04%) (Figure 7).  Calculations were made of the average, dominant, minimum, maximum, and range values for each analysed variable. Details of the calculations are included in Appendices A-C.
On the basis of the average answer, the following fundamental directions of activities were distinguished: smart and sustainable buildings and infrastructure, smart energy, and smart mobility.
With regard to the beneficial factors, they were grouped into the following categories: Calculations were made of the average, dominant, minimum, maximum, and range values for each analysed variable. Details of the calculations are included in Appendices A-C.
On the basis of the average answer, the following fundamental directions of activities were distinguished: smart and sustainable buildings and infrastructure, smart energy, and smart mobility.
With regard to the beneficial factors, they were grouped into the following categories: social, economic, environmental, governance, and urban infrastructure. The most important social factors were: education directed towards citizen development, social responsibility, informed citizens, and innovative health care and sanitation facilities. In the case of economic factors: innovation, urban lab, Research and Development (R&D), sustainable management of resources, circular economy and partnership formation, and multisector synergies. In the case of environmental issues, these were energy related (renewable resources, saving initiatives, smart systems) and water related (monitoring quality, efficiency of water usage and pollution prevention, and reduction). Governance factors included citizen empowerment, interactive and participatory services, co-production, co-creation, bottomup approaches, definition of Key Performance Indicators (KPIs); monitoring/assessment and stakeholders' engagement, internal (cross-sector) and external. In the case of the last category-infrastructural factors-these were: affordable housing facilities such as water and energy supply, the adoption of innovative construction techniques, and Internet of Things (IoT).
With regard to adverse factors in the social category, the highest values were obtained by the lack of citizen participation, lack of trust. and lack of social awareness. In the economic group, it was the high cost of urban infrastructure, imbalance of investments, lack of funding and investors; short time horizon of investments and weak public-private partnership. For environmental factors, climate change, increasing resource consumption and growing population, and imbalance between liveability and environment. In the governance category, it was a lack of planning, lack of vision and strategy, lack of capacity (HR), and lack of IT knowledge among city planners. In the last group, infrastructural, it was technological obsolescence, system failures, infrastructure fragility, lack of infrastructure integration, complexity of networks, and deficit of technological infrastructure.
Referring to the interclass correlation coefficient (CCI), item scores for individual beneficial and adverse factors were averaged-generic indicators for each beneficial and adverse factors were created (scale for adverse factors was reversed, so higher number indicated a higher significance in inhibiting the development of smart city concepts and solutions in Poland by 2020). Agreement between experts was the highest for the environmental adverse factor (ICC 95% CI = 0.71 [0.41; 0.91]) and the lowest for the governance beneficial factor (ICC 95% CI = 0.05 [−0.26; 0.50]). ICC values lower than 0.50 indicated low agreement between experts, 0.50 and above showed mediocre agreement, and 0.75 and above showed good agreement (Table 10).  M ± SD-mean with standard deviation, Me (min-max)-median with a range of observed scores. ICC estimates and their 95% confident intervals were based on a single measure for fundamental development directions (as no general indicator was built for those items) and on an average measure for beneficial and adverse factors (as they were later on averaged for other analyses). All ICC values were based on absolute-agreement, 2-way random-effects model.
A qualitative analysis was also carried out, which was related to the search for inclination in the experts' responses. Therefore, on the basis of the estimated absolute value of the dominant, individual variables were grouped into clusters corresponding to the value of the dominant. A total of four such clusters (Appendix D) were created. The list of cluster 1 with the highest value of the dominant is presented in Table 11.  Almost all variables were correlated to each other. The P value was larger than 0.050 only for the analyses between urban infrastructure (adverse factor) and social factors (beneficial), urban infrastructure (adverse factor) and economic factors (beneficial), and environmental factors (adverse) and economic factors (beneficial). In the case of other variables, as the level of one variable increased, an increase in the level of the other variables could be observed (all correlations were positive ones). For example, the higher the assessment of the social factors' influence, the higher the assessment of the influence of economic factors (r = 0.76; p < 0.001). R values lower than 0.40 indicated a weak relationship, 0.40-0.59 was moderate relationship, 0.60-0.79 was a strong relationship, 0.80 and above was a very strong relationship (Appendix E).
Correlations with the Spearman's coefficient were also significant in most cases (except for the relationships between urban infrastructure (adverse factor) and the social, economic and environmental beneficial factors). The interpretation of the strength of dependencies was the same as for the Pearson's coefficient (Appendix F).
Network analysis tools such as visualisations, betweenness indicators, and vector values were used for the analysis and interpretation. In the case of network visualisations in Pajek software, the thickness of lines between the individual network elements designates the strength of relation, with thicker lines meaning stronger impact (both positive as in the case of beneficial factors, and negative in the case of adverse factors).
The authors selected two parameters to select fundamental directions, beneficial factors, and adverse factors with a significant impact on the development of smart cities: the value of betweenness and the value vector, whose value could be determined in Pajek software.
The value of betweenness shows the probability with which a given factor is crucial for shaping, in this particular case, the beneficial and adverse factors. This is calculated on the basis of all connections within the network, with values added to a unit, where the higher the betweenness value, the higher the importance of the factor's variable that can be shown. On the other hand, the vector's value determines the strength of impact of the factor on the indicator. In this study, it was in accordance with the assumed scale (see Section 3). The higher the vector's value, the bigger its impact on the indicator. The experts' individual opinions were assigned to individual fundamental directions, beneficial factors, and adverse factors, considering the strength of impact of the individual variables. This allowed us to determine the nature of the relation network: bility, and smart energy. An additional trend, identified by the participants, was presented in the cumulative list: construction/energy passive districts, zero-emission construction.
However, there are other directions that were also highly rated. These include planning green public spaces, 15-min cities, solutions for intelligent mobility, cybersecurity, or advanced waste management methods (Appendix G).
Therefore, according to the research results, Polish smart cities will be driven by solutions related to smart building by 2030 (e.g., the optimisation of energy consumption, waste management, low and zero emission solutions, decarbonisation of buildings, digital twins, smart sensors, and cloud computing enable monitoring real-time forecasting of energy consumption, detection of security threats, and the optimisation of expenses). Emission-free transport, intelligent traffic management, and the use of artificial intelligence in public transport will also play a significant role.
Analogous calculations were conducted for the beneficial factors in individual categories, considering the experts' additional indications.
In the social sphere, the key beneficial factors included innovative health care and sanitation facilities, education directed to citizen development and social responsibility, and informed citizens. Additionally, factors such as public provision of urban services, community development, collectivism, and volunteering networks. The most important factors with regard to economy are innovation, urban lab, Research and Development (R&D), sustainable management of resources, circular economy and partnership formation, and multisector synergies. In this group, also important were the promotion of social and human capital, attracting and retaining workforce, and flexibility of the labour market. Environmental factors made up yet another group. The following were deemed crucial by the respondents: energy related (renewable resources, saving initiatives, smart systems, smart building, Responsive Building Envelope (RBE)) and water related (monitoring quality, efficiency of water usage). In addition, significant factors were smart waste management, recycling and mobility related (efficient transport systems, cycle paths). Among the administrative factors, the highest scoring ones were urban planning (strategy and vision definition, capacity planning, i.e., infrastructure, cost, and human resources), the definition of Key Performance Indicators (KPIs); monitoring/assessment and stakeholders' engagement (internal (cross-sector) and external). Additionally significant in this category were supportive government policies, political will and synergy, alignment and management of conflicts of interests, data governance (data quality, data sharing, and data privacy policies). The last category included infrastructural determinants, notably, affordable housing facilities, water and energy supply, adoption of innovative construction techniques, and Internet of Things (IoT). In addition, important factors in this group include connectivity, broadband, access to Internet facilities, advanced ICT, intelligent technologies in urban services, and the use of geographical information systems (GIS) (Appendix H).
Referring to adverse factors, the most important social factors were listed as a lack of citizen participation, lack of trust, and lack of social awareness. Of less importance were: resistance to change, social exclusion and gentrification, availability of services for different communities, and fact that Polish society is not very active and not very pro-social. In the case of economic adverse factors, the list of key ones included the high cost of urban infrastructure, imbalance of investments, lack of funding and investors, the short time horizon of investments, and unemployment. The factors with lower ratings included competitiveness (local against regional and international markets), imbalance between competitiveness and quality of life, and unemployment and the lack of equity access to the labour market. For the environmental aspects, the respondents gave the highest scores to the following ones: resource scarcity, loss of biodiversity, climate change, and increasing resource consumption. Other environmental factors such as the lack of resource sharing, lack of holistic approach for environmental sustainability, and the lack of knowledge on how ICT can decrease energy consumption. For another category-administrative factors-the key aspects were a lack of planning, a lack of vision and strategy, a lack of capacity (HR), and the inability of policies. It is also worth pointing out the lack of project management, structure issues (complexity of organisational structures, political instability), and complexity. In the last group, containing infrastructural factors, the most important ones were technological obsolescence, systems failures, infrastructure fragility, lack of infrastructure integration, complexity of networks, and deficit of the technological infrastructure. Moreover, the following deserve attention: a lack of systems interoperability, a lack of integration standards, and lack of systems security and privacy violation (Appendix I).
Based on the network analysis, a SWOT analysis was prepared containing the key beneficial factors of development, the key adverse factors of development, benefits, and disadvantages of smart city development (Table 12). • Limited privacy: As authorities or the government will have access to security cameras and smart systems connected through many different spaces, citizens will find it difficult to remain anonymous, leading to a change in the citizens' perceptions of privacy. • Social control: people who can track and centralise the data they collect using security cameras will have more power, administrative units will be able to control and even manipulate public opinion. • Over-trust in the network: as citizens will rely on electronic solutions, they can lose their autonomy in making decisions and become incompetent, they can react inappropriately in situations where these tools are not useful. • Difficulties at the pre-commercial stage: there may be difficulties in using innovative technologies due to the mismatch of the competences of the operators. • Initial training is required: if the city's residents are unfamiliar with the technology, they will not be able to use it, so a significant social change is necessary. Key development directions, beneficial factors, and adverse factors of smart cities in Poland by 2030 were selected on the basis of the completed analyses (based on the opinions of experts). Still, it must be pointed out that in numerous cases, the remaining variables had similar scores and values of the estimated factors. This points to a significant complexity of creative processes and conditions for the implementation of projects, solutions, and technologies of smart cities.

Discussion
By 2026, smart cities may potentially generate USD 20 T of economic benefits. Organisations of various types are encouraged to finance smart city projects through green stimulation packets and strategies that help reduce their financial risk and ensure a potential for additional revenue. On the basis of Barclays' analyses, it was shown that the fundamental trend driving the changes of city centres towards "smart cities" will be technological innovations within municipal infrastructure, which, in turn, play a key role for development, by ensuring that foundations are already in place before additional solutions and services appear [135].
C. Ratti and A. Townsend identified the basic tendency to be the development of high technologies that allow for fast, unlimited transfer of data, the availability of databases, the emergence of effective, easily programmable infrastructure, and the continuously extended network of sensors and drivers, as the implicators of changes towards smart cities. The main benefit comes from the improved quality of services provided to a city's users and the savings of financial expenditure, time, and energy from the perspective of the functioning of a city [136].
It is worth noting that the main directions of changes and the development of smart cities also depend on the city's size and location. Such areas are described, among others, in the Domestic Municipal Policy 2030 and include security, good access to high quality public services including health care, a job market, housing offerings, leisure options, cultural offerings, natural environment, public transport, and attractive public spaces. The document also shows that a city can be an attractive location in three aspects. Apart from the attractive nature of the work and living place, the accessibility and quality of the so-called third place-a place of leisure-is just as important. Equally important are broadly reaching activities improving the quality of public health care [137,138].
In the local documents, however, the implicators are described in a definitive way, according to the diagnosed specifics of a city. The key directions for Warsaw are, foremost, the smart management of environmental resources and smart city management [139]. In Kielce, the tendencies include electronic administration, open access to data, and power engineering [140]. In the strategy for Nowa Ruda, despite the small number of entries in documents relating to smart cities, the quality of educational services was indicated as the key to further development of the city under the smart city concept [141]. Most of the development areas regarding Krakow's 2030 strategy for smart city solutions and technologies were identified as any and all activities fostering sustainable development, with a particular focus on pro-ecology, transport system, and open data activities [142].
In the literature on the subject, there have been many analyses relating to directions in smart city development. V. Albino, U. Beradi, and R.M. Dangelico emphasise the importance of intelligent mobility aimed at improving the city's transport by using advanced technologies in the transport process [44]. In addition, intelligent mobility or transport is one of the most important applications of a smart city, thanks to which cities can opt for road traffic [143]. Other authors have emphasised the role of intelligent building in terms of heating, air conditioning, optimisation of the use of lighting, window shading, and energy management systems [144]. Some of the analyses are directly related to the energy issue of smart cities, the main element of which is the use of diversified sources of renewable energy, and the reduction in greenhouse gas emissions [145]. The security technology issues were also highlighted as a key smart component in tracking inappropriate human behaviour, monitoring community activities, and detecting specific individuals in the event of disasters and criminals [146]. In addition, we can talk about factors such as intelligent water solutions [147], computing innovations to improve education [148], smart streets [149], intelligent water supply network [150], and intelligent parking [151].
Based on the quoted research from the literature on the subject, it can be indicated that the development directions of a smart city include areas related to innovations in the field of intelligent life, intelligent economy, intelligent environment, intelligent education, intelligent management, intelligent energy, intelligent security, intelligent mobility, intelligent hospitals, intelligent buildings, and construction, which is consistent with the analyses carried out. The differences, however, consist in the indications of the significance of individual factors, which are related to the specificity of the level of socio-economic development in Poland.
Based on a multi-criteria analysis using the TOPSIS technique, S. Hajduk has developed a ranking of smart cities based on urban intelligence. Kraków received the highest rating. The most important development directions of this urban center were solutions in the field of environmental protection and building social capital [152]. G. Mąsik, I. Sagan, and J.W. Scott conducted research on the Polish cities of Warsaw, Krakow, Łodz, Wroclaw, Poznan and Gdansk. They showed that the most important development directions of Polish smart cities are participatory management, digitisation of service provision, meeting social needs, and combining smart programs with wider goals of urban development [74]. P. Maleszyk conducted research on the basis of an intelligent neighbour satisfaction recognition tool implemented in Lublin (Poland). It should be noted that such solutions may contribute to giving development directions and implementing intelligent solutions based on participatory management and the level of the residents' satisfaction [153].
The key fundamental directions listed in EU-level documents, within European innovations partnership for smart cities and communities, are predominantly related to power engineering (smart grids, smart measuring, smart distribution, smart energy management) and transport. It can therefore be concluded that the results from the analysis of the authors' own studies converge with the presented development directions for smart cities in Poland by 2030, both on a domestic level and on a local level, in relation to particular cities.

Conclusions
The quality of life and civilisation standards are determined by the development of science and technological advancements. Currently, cities need highly effective solutions that generate sustainable economic growth and social prosperity, which are reflected in the inhabitants' improved quality of life. This is the basic assumption behind the creation of new, organisational units-smart cities. The characteristic feature of these solutions and concepts is "intelligence", which can be understood as the sum of various improvements to the functioning of municipal infrastructure, city resources, and public services. Given the current complexity of human functioning in a city, it is necessary to develop and implement innovative solutions of a social, environmental, economic, infrastructural, and administrative nature. Depending on the domestic or local conditions, other phenomena may be present, which may accelerate or hinder the use of smart city solutions and technologies.
The research objective was an attempt to indicate the expected changes in the shaping of the idea of smart cities in Poland. The authors' own study was conducted from 2 to 31 August 2022, based on a focus interview with 23 experts that were professionally connected to smart city issues.
Based on the intraclass correlation coefficient (ICC), it was shown that the compliance of experts in the field of beneficial factors from the social, environmental, and urban infrastructure category was average. Similarly, in the case of the adverse factors in the categories oof social, economic, and environmental.
It should be noted that almost all the variables were correlated with each other. No correlation was found between urban infrastructure (adverse factor) and social factors (beneficial), urban infrastructure (adverse factor) and economic factors (beneficial), and en-vironmental factors (adverse) and economic factors (beneficial). However, in the case of the remaining variables, with an increase in the level of one, there was an increase in the level of the other variables (all correlations were positive).
In the research process, the method of network analysis was used, and the Pajek program was used for analysis and visualisation. A network of relations, spanning a total of 3034 connections (98 variables were examined, made up of 49 beneficial factors and 49 adverse factors), was developed from the responses of the experts.
With regard to trends that will be of crucial importance for the development of smart city projects in Poland by 2030, the directions are smart and sustainable buildings and infrastructure, smart mobility, and smart energy. Both beneficial and adverse factors were divided into categories of social, economic, environmental, administrative, and infrastructure. The following were highlighted among the most critical beneficial factors: innovative health care and sanitation facilities, innovation, urban lab, Research and Development (R&D), renewable resources, urban planning: strategy and vision definition, capacity planning (i.e., infrastructure, cost, and human resources), and affordable housing facilities. The major adverse factors for such projects included a lack of citizen participation, high cost of urban infrastructure, resource scarcity, lack of planning, a lack of vision and strategy, and technological obsolescence. It should be noted that results similar to those in the network analysis were obtained after estimating the descriptive statistics.
It should be added that the results of the study led to a conclusion that highly complex, creative processes and circumstances exist that are related to the implementation of the vision of smart cities.
The limitations of this research are related to the scope of the focus interview, of which 23 experts is not representative. At the same time, selected research parameters such as development directions, beneficial factors, and adverse factors were selected on the basis of an analysis of the literature on the subject. Therefore, future research should include the possibly broadest sample of engaged experts, not only related to the real economy, but also from the scientific community. They will also include other research methods such as Delphi or the analysis of strategic documents at the national and EU level, considering the research and development programs. At the same time, the research will also relate to individual regions of Poland and selected cities that implement these powerful solutions, considering the statistical analysis of the selected factors.