The Usage and Perception of Pedestrian Zones in Lithuanian Cities: Multiple Criteria and Comparative Analysis

: As pedestrian zones are public spaces in urban areas, they are important in terms of meeting people’s needs. However, it is worth noting that attention should be paid not only to the development of the physical infrastructure, but also to a sustainable balance between the socio-economic and environmental aspects. To guide urban planning and management initiatives towards more sustainable patterns, it is essential to re-examine the already existing characteristics of cities, establishing how they are used and perceived by inhabitants. The present research suggests environmental, economic and social criteria that determine a greater vitality of pedestrian zones in cities and better life quality for the inhabitants. A questionnaire survey was used to assess common attitudes regarding the research topic in major cities in Lithuania. The multiple criteria decision-making COPRAS ( COmplex PRoportional ASsessment ) method was used for the formation of a priority queue. The research results showed the attitudes of inhabitants towards pedestrian zones in Vilnius, Kaunas and Klaip˙eda. The inhabitants of these three cities regarded social and environmental criteria groups as the most signiﬁcant. Contrary to what was expected and anticipated, respondents do not consider economic criteria as playing a key role in the sustainable preservation and development of pedestrian zones.


Introduction
Pedestrian zones are public spaces in cities and towns intended for the use of pedestrians. They are characterised by a partial or full restriction of vehicle traffic. Pedestrian zones are created to provide improved accessibility and mobility for pedestrians, to enhance economic activities in the given city/town area through its shopping and other businesses and to improve an area in terms of its environment by reducing air pollution and noise, as well as socially by increasing safety and providing space for human health improving activities such as walking and cycling. Public spaces are important for the meeting of public needs, socialisation, social gatherings and active recreation [1][2][3][4][5][6]. It is argued that public spaces can be perceived as a mirror of social customs, values and culture [7][8][9][10][11] that reveal A system of criteria for defining the perception of pedestrian zones was identified via an extensive literature review. A total of 21 criteria were identified. Subsequently, the criteria system was validated and weighted via a questionnaire survey.
As part of the aim of the article was to determine the attitude of inhabitants towards pedestrian zones, the selected qualitative method helped to reveal common attitudes in terms of each criterion. The respondents evaluated each statement based on a five-point Likert scale [32] from 'insignificant/least important' to 'very significant/most important' (a lower number indicates that respondents regard the statement to be less suited to them). The respondents were asked for the following information: the frequency of their visits to the main pedestrian streets in their cities, their age, education and social status-all of which are factors that may affect their attitude towards the sustainable use of pedestrian street land in major cities.
In order to evaluate the use of land in pedestrian zones in major Lithuanian cities, 100 inhabitants in each city-Vilnius, Kaunas and Klaipeda-were surveyed. The total sample of survey responses obtained was 300, which is a 100% response rate. All respondents were interviewed during the day-time in the pedestrian zones of each case study city. Respondents aged over 18 and above were approached randomly.

Statistical Tests Used for Questionnaire Data Analysis
The data from the surveys were calculated using SPSS (Statistical Package for the Social Sciences) software, which is suitable for processing and working with collected data, its analysis and the determination of data correlation. The data obtained during the survey were processed with SPSS 17 and the figures were created using Microsoft Office Excel 2007.
Presentation of data analysis: The analysis was conducted in writing. The method of visualisation of presented data comprised diagrams and tables. For the data expressed in Likert scales, means (M) and standard deviations (SD) were calculated, while the number of respondents (N) was presented. For the data expressed in ordinal or nominal scales, the percentage was calculated (pct.). In order to compare the differences between the obtained results for the various socio-demographic groups of respondents, the following statistical criteria were used: (a) Mann-Whitney test-used to determine the differences between two populations when the compared variable was an ordinal or interval one and the conditions of the parameter criteria were not met (this criterion is an analogue of an independent sample t-criterion). The criterion assumes that value distribution in both populations is equal, while in one population the distribution might be shifted in respect to the other population and in the samples, the compared variable shall be of no lower measurement level than the ordinal variable. Furthermore, a large number of combined ordinals should be avoided, that is, the ordinal variable should have a sufficient number of different values (usually, seven are sufficient) [33]. (b) Kruskal-Wallis is a non-parametric equivalent of one-factor analysis of variance. Based on this criterion, relative/interval and ordinal variables can be compared in three or more independent samples) [33]. (c) Pearson χ 2 criterion of compatibility ('chi-square') (when the results are expressed in nominal or ordinal scales).
In all cases, the difference is considered statistically significant when its reliability is higher than 95 per cent, that is, when p < 0.05.

Multiple Criteria COPRAS Assessment Method
Since the aim of this article was to evaluate the sustainability of pedestrian zones in major cities in Lithuania, multi-purpose solution methods (MSM) are used to compare alternatives [34]. The simplest method of the MSM methods group is the multiple criteria, complex proportional assessment of alternatives, COPRAS method [35]. The sustainability of pedestrian zones in each city has been assessed using the COPRAS assessment method. Three criteria were selected and validated in order to apply this method, each of which is then elaborated. As a result, the assessment has been done against 21 distinguished criteria.
The main principle of the COPRAS method is the relative importance of the compared alternatives. Q i is determined on the basis of the defining positive S +i and negative S −i features. The greater the value of Q i , the more the alternative is in line with the needs of the decision maker. Six stages constitute the algorithm of the method.
Stage 1 By using the data from the solution table, a decision matrix X = x ij [m×n] , i = 1, m; j = 1, n is compiled where rows denote the analysed alternatives (m is the number of alternatives) and the columns denote efficiency indicators (n is the number of efficiency indicators) based on which the alternatives are assessed. Stage 2 The elements of the decision matrix X are normalised in accordance with the equation: where x ij is the value of the jth indicator of the ith alternative.
Stage 3 By multiplying the elements of the decision matrix by the importance values of the respective efficiency indicators, the weighted normalised decision matrix D = d ij [m×n] , i = 1, m; j = 1, n is obtained, the elements of which are calculated in accordance with the equation: where ( q 1 , q 2 , . . . , q n ) is the vector of importance values of efficiency indicators.
Stage 4 ith alternatives are calculated, the weighted normalised sums of maximised and minimised indicators, S +i ir S −i , respectively: where k is the number of maximised indicators; n is the number of minimised indicators. Stage 5 The relative importance of alternatives (efficiency) Q i is determined in accordance with the equation: The higher the value of Q i , the greater the rationality (efficiency) of the alternative [36]. Stage 6 By using the relative importance of alternatives Q i , the degree of efficiency N i of each ith alternative is calculated: where Q max is the highest assessment of an alternative obtained using the COPRAS method, which will be used to compare assessments of other alternatives Q i obtained using the COPRAS method. On the basis of efficiency assessments of alternatives N i , the alternatives are listed by priority.

Object of the Study
The object of the study is the pedestrian zones in three major Lithuanian cities-Kaunas, Vilnius and Klaipeda. See Figure 1.

Object of the Study
The object of the study is the pedestrian zones in three major Lithuanian cities-Kaunas, Vilnius and Klaipeda. See Figure 1. Kaunas is the second-largest city in Lithuania and was the temporary capital of the country from 1919 to 1940. Data provided by Statistics Lithuania show that in 2015, 301,357 people were living in Kaunas [37]. Laisves Avenue is the main street in the New Town ( Figure 2); it was reconstructed in 1982 and made into a pedestrian boulevard. Along with the central Vilnius Street in the Old Town, it constitutes the longest pedestrian zone in Eastern Europe [38]. The Old Town is located at the confluence of the Nemunas and Neris rivers with its main objects being the castle, the town hall and the surrounding streets. Many significant architectural monuments of the city are located here. Vilnius is the capital of Lithuania. Data provided by Statistics Lithuania show that in 2015, 531,910 people were living in Vilnius [37]. Gediminas Avenue and the Old Town are the main pedestrian zones in Vilnius ( Figure 3). Gediminas Avenue is 2 km long the central street of Vilnius, which connects four squares. Also, Gediminas Avenue links the historical city (old town) with Vilnius Kaunas is the second-largest city in Lithuania and was the temporary capital of the country from 1919 to 1940. Data provided by Statistics Lithuania show that in 2015, 301,357 people were living in Kaunas [37]. Laisves Avenue is the main street in the New Town ( Figure 2); it was reconstructed in 1982 and made into a pedestrian boulevard. Along with the central Vilnius Street in the Old Town, it constitutes the longest pedestrian zone in Eastern Europe [38]. The Old Town is located at the confluence of the Nemunas and Neris rivers with its main objects being the castle, the town hall and the surrounding streets. Many significant architectural monuments of the city are located here.

Object of the Study
The object of the study is the pedestrian zones in three major Lithuanian cities-Kaunas, Vilnius and Klaipeda. See Figure 1. Kaunas is the second-largest city in Lithuania and was the temporary capital of the country from 1919 to 1940. Data provided by Statistics Lithuania show that in 2015, 301,357 people were living in Kaunas [37]. Laisves Avenue is the main street in the New Town ( Figure 2); it was reconstructed in 1982 and made into a pedestrian boulevard. Along with the central Vilnius Street in the Old Town, it constitutes the longest pedestrian zone in Eastern Europe [38]. The Old Town is located at the confluence of the Nemunas and Neris rivers with its main objects being the castle, the town hall and the surrounding streets. Many significant architectural monuments of the city are located here. Vilnius is the capital of Lithuania. Data provided by Statistics Lithuania show that in 2015, 531,910 people were living in Vilnius [37]. Gediminas Avenue and the Old Town are the main pedestrian zones in Vilnius ( Figure 3). Gediminas Avenue is 2 km long the central street of Vilnius, which connects four squares. Also, Gediminas Avenue links the historical city (old town) with Vilnius Vilnius is the capital of Lithuania. Data provided by Statistics Lithuania show that in 2015, 531,910 people were living in Vilnius [37]. Gediminas Avenue and the Old Town are the main pedestrian zones in Vilnius ( Figure 3). Gediminas Avenue is 2 km long the central street of Vilnius, which connects four squares. Also, Gediminas Avenue links the historical city (old town) with Vilnius city centre (the Cathedral Square and the Seimas Palace). Vilnius Old Town is the first Lithuanian cultural heritage site to be recognised globally, having been included in the UNESCO World Heritage List in 1994 for preserving an impressive complex of Gothic, Renaissance, Baroque and classical buildings as well as its medieval layout and natural setting [38].
Sustainability 2018, 10, x FOR PEER REVIEW 6 of 21 city centre (the Cathedral Square and the Seimas Palace). Vilnius Old Town is the first Lithuanian cultural heritage site to be recognised globally, having been included in the UNESCO World Heritage List in 1994 for preserving an impressive complex of Gothic, Renaissance, Baroque and classical buildings as well as its medieval layout and natural setting [38]. Klaipeda is the oldest city in Lithuania, first mentioned as Memelburg in 1252 [38]. Data provided by Statistics Lithuania show that in 2015, 156,141 people were living in Klaipeda [37]. Klaipeda Old Town ( Figure 4) is distinguished by its fachwerk-style architecture and the planned structure of the streets which is atypical of all other Lithuanian old towns.  Klaipeda is the oldest city in Lithuania, first mentioned as Memelburg in 1252 [38]. Data provided by Statistics Lithuania show that in 2015, 156,141 people were living in Klaipeda [37]. Klaipeda Old Town ( Figure 4) is distinguished by its fachwerk-style architecture and the planned structure of the streets which is atypical of all other Lithuanian old towns. city centre (the Cathedral Square and the Seimas Palace). Vilnius Old Town is the first Lithuanian cultural heritage site to be recognised globally, having been included in the UNESCO World Heritage List in 1994 for preserving an impressive complex of Gothic, Renaissance, Baroque and classical buildings as well as its medieval layout and natural setting [38]. Klaipeda is the oldest city in Lithuania, first mentioned as Memelburg in 1252 [38]. Data provided by Statistics Lithuania show that in 2015, 156,141 people were living in Klaipeda [37]. Klaipeda Old Town ( Figure 4) is distinguished by its fachwerk-style architecture and the planned structure of the streets which is atypical of all other Lithuanian old towns.

Criteria System for Appraising the Perception of Pedestrian Zones and Criteria Weights
Developing pedestrian zones is important in order to separate citizens from vehicle traffic and encourage people to return to safe, comfortable and interesting environment in city centres. Thus, when assessing pedestrian zones, environmental, economic and social criteria are all important. The criteria were determined after completing the literature review (Table 1). Table 1. Criteria for successful pedestrian zones as public spaces.
C13. Safety and low crime rates [4,6]. The majority of criteria were defined using a critical analysis of topic-related literature (peer review academic papers) and some criteria, such as C9, C19 and C21, were added as important to take into account following the survey results.
The criteria for successful pedestrian zones as public spaces listed in Table 1 can be divided into environmental, economic and social criteria, described as follows.

Environmental Criteria
C1. Noise protection: protected against vehicle noise-due to growing urban automobilisation, city centres have become abundant with cars, which has resulted in noisy streets [14]. Pedestrian zones should be areas where people enjoy spending time and want to return, so successful pedestrian zones should be protected against vehicle noise [39].
C2. Air pollution: protected from road transport pollution-due to growing urban automobilisation, city centres have become abundant with cars, which has resulted in streets becoming polluted with dust and gas [14]. According to the European Economic and Social Committee (ECO/273, 2010), air pollution caused by vehicles is considered to be the most severe issue in major cities [40][41][42][43]. Good pedestrian zones should therefore be protected against pollutants emitted by vehicles [39].
C3. Presence of trees and green zones-the European Economic and Social Committee (ECO/273, 2010) has said that preserving biodiversity and focusing on protecting green zones is important [43,44]. Deveikis et al. (2014) also wrote about the importance of green zones, claiming that they protect against noise and pollution by suppressing between 20% and 80% of dust [45]. Beatley and Newman (2013) advocate for 'biophilic cities' that can provide close contact with nature [61]. Such cities foster social and landscape resilience, contributing to sustainable development [47].
C4. Clean environment: recycling bins, tidy and clean streets and footpaths-good pedestrian zones are comfortable. Comfort encompasses cleanliness, among other things, while recycling bins are required to conserve the environment; thus, they are important for the sustainable use of pedestrian zones [48].
Consequently, successful and good pedestrian zones, as public spaces for people, should be safe (in terms of motor and non-motor vehicles) as well as protected against the pollution and noise caused by cars. Trees, green zones and a clean environment are important in order to preserve ecological balance.

Economic Criteria
C5. Commerce and meeting visitors' needs-good and successful pedestrian zones should contain shops, cafés [39] and other service vendors, because various shopping [3], dining [6] and interaction opportunities are important.
C6. Job creation-as tourism [49] and small and medium businesses [50] grow in good and successful pedestrian zones, investment attraction also grows [39], which results in job creation.
C7. Incentives for small and medium businesses-vital pedestrian zones contain many business opportunities [51] since frequent visits by people and walkability allow businesses to grow [50].
C8. Tourism development-scientists claim that the infrastructure of pedestrian zones in cities, which has been fixed and adapted for larger visitor flows, attracts more tourists [49,52] resulting in additional income from tourism [14].
C9. The authors of this study believe another important economic factor is customer friendly parking prices-it is presumed that in countries where salaries are below the EU average, this is an important factor that can affect how cities are visited.
Thus, successful and vital pedestrian zones can lead to economic benefit by attracting more visitors which in turn leads to income. Vital pedestrian zones offer many new business opportunities: since companies that provide services and shopping opportunities are important here, jobs are created as a result.

Social Criteria
C10. Comfortable and safe space for cyclists/C11. Comfortable and safe space for pedestrians-as a good public space, pedestrian zones should be comfortable and convenient [4]. Comfort also encompasses the understanding of safety [53].
C13. Safety and low crime rates-a good public space must ensure the feeling of security and have protection against traffic and possible crimes [6].
C14. Night-time street lighting-lights provide a sense of safety and protect against accidents (such as stumbling on the footpath, etc.) in the night-time and help to find the way [56,57]. Thus, good pedestrian zones should be lit [53].
C15. Developing communities: space for meetings and interaction-Sisman (2013) and Asadi-Shekari et al. (2015) claim that good pedestrian zones should encourage communal activities, improve communication in the community and offer discussion [54,55] and improvement [18] opportunities.
C16. Entertainment: attractive space for entertainment, culture, art projects, city festivals, fairs and other events-a good public space should offer meaningful activities [4,6] and entertainment, that is, things that encourage people to return [49]. The review of various studies has shown that people depend on the functional, social and leisure activities [58] provided on the streets as well as their attractions [49].
C17. Cultural space: aesthetic appearance of the streets and buildings, architectural and cultural heritage monuments and their preservation-good public spaces should be of high aesthetic quality [59]. Mehta (2014) also notes distinguished environmental visualisation and the quality of the space [6]. How the public space is managed is also important, that is, whether the ground coverings are high quality for walking. Cultural heritage is also important and affects the appeal of pedestrian zones [39]; they can also serve as attractions [49].
C18. Promoting healthy lifestyle: space for cyclists, athletes and people who engage in other types of active leisure-successful pedestrian zones and streets should be designed in such a way that makes them suitable for cyclists and other fans of active leisure. It is also important to ensure the safety of bikes, that is, offer ways to leave a bike, lock it etc. [60].
C19. Residential area: apartments, hotels and homes-this is important for tourism development as well as people who want to live in the pedestrian zone.
C21. Accessible parking (in terms of distance)-the authors of this paper believe that accessible parking, in terms of distance, must also be included. This is especially relevant to families with minors or seniors as well as the disabled who are also drivers.
Consequently, good and successful pedestrian zones should be adapted for recreation and tourism and encourage communities and the growth of a healthy lifestyle. Pedestrian zones should be lit at night and protected against vehicle traffic and crime. Cultural heritage monuments are also important as attractions as well as for the aesthetic appearance of the streets and buildings. Furthermore, pedestrian zones should be accessible via public transport or convenient, accessible parking.

Survey and Usage of Pedestrian Areas
In order to determine how city residents use and view pedestrian zones in Kaunas, Vilnius and Klaipeda, a survey was conducted with 100 residents who walked through the pedestrian zone during the day time in each city. The total sample of all residents (Kaunas, Vilnius and Klaipeda) was 300 (100% of response rate). The respondents over 18 and above age were approached randomly, however the socio-demographic characteristic of respondents were noted (see Table 2).
The results presented in Table 2 show the ratio of men and women was similar among respondents in all three cities. Most of the participants in the study were over 60 years old in all city groups. More than half of the respondents in all three cities had higher university education. As can be seen from Table 2 and according to the distribution of respondents by social status, most of them were unemployed and seniors.
It was found that only 14% of respondents visit pedestrian zones in major Lithuanian cities once or twice per week while 23% said they visit them several times per month. Meanwhile, almost one fifth of correspondents visit such areas only a few times per year and the remaining 44% visit them once or more per month. As seen in Figure 5, the frequency of respondents' visits to pedestrian zones varies significantly (p < 0.05). It was determined that residents of Vilnius visit pedestrian zones significantly more frequently (a few times per month) than residents of Klaipeda or Kaunas. Meanwhile, residents of Kaunas visit pedestrian zones significantly less frequently (only a few times per year) compared with residents of the other cities. Table 2. Socio-demographic characteristics of respondents.   The data provided in Table 3 show the purpose of respondents' visits to pedestrian zones. It was determined that in the case of Vilnius, shopping activity significantly varied: residents shop in Gediminas Avenue much more often than in the Old Town (p < 0.05). Meanwhile in the case of Kaunas, all three activities varied significantly: it was determined that residents of Kaunas choose Laisves Avenue much more often for walks and shopping and the Old Town zone is frequented due to cultural activities and entertainment.  The data provided in Table 3 show the purpose of respondents' visits to pedestrian zones. It was determined that in the case of Vilnius, shopping activity significantly varied: residents shop in Gediminas Avenue much more often than in the Old Town (p < 0.05). Meanwhile in the case of Kaunas, all three activities varied significantly: it was determined that residents of Kaunas choose Laisves Avenue much more often for walks and shopping and the Old Town zone is frequented due to cultural activities and entertainment. In both cities, respondents engage in cultural activities and entertainment the most, about one fourth of respondents go on walks and only the minority go shopping. It should be noted that activities in different zones varied significantly in the cases of shopping and culture (p < 0.05), which shows that in terms of statistical significance, residents more often choose Gediminas Avenue and Laisves Avenue for shopping and the Old Town pedestrian zones for cultural activities and entertainment.

The Importance of the Criteria
In order to determine how respondents perceive pedestrian zones based on the criteria described in Section 4.1, the importance of the criteria was first determined. Respondents assessed the significance of criteria on a five-point Likert scale where 1 means 'the least important' and 5 means 'the most important.' The questions to be answered were: -How do urban residents perceive the importance of pedestrian zones in their cities? -Which environmental, economic and social criteria are the most important with regard to the main pedestrian streets in cities?
It was determined that tourism development (C8) and incentives for small and medium businesses (C7) were the most important of the economic criteria, safety and crime rates (C13), comfortable and safe space for pedestrians (C11) and night-time street lighting (C14) were the most important of the social criteria, while clean environment (C4), noise levels (C1) and pollution levels (C2) were seen as the most important of the environmental criteria ( Figure 6). In both cities, respondents engage in cultural activities and entertainment the most, about one fourth of respondents go on walks and only the minority go shopping. It should be noted that activities in different zones varied significantly in the cases of shopping and culture (p < 0.05), which shows that in terms of statistical significance, residents more often choose Gediminas Avenue and Laisves Avenue for shopping and the Old Town pedestrian zones for cultural activities and entertainment.

The Importance of the Criteria
In order to determine how respondents perceive pedestrian zones based on the criteria described in Section 4.1, the importance of the criteria was first determined. Respondents assessed the significance of criteria on a five-point Likert scale where 1 means 'the least important' and 5 means 'the most important.' The questions to be answered were: -How do urban residents perceive the importance of pedestrian zones in their cities? -Which environmental, economic and social criteria are the most important with regard to the main pedestrian streets in cities?
It was determined that tourism development (C8) and incentives for small and medium businesses (C7) were the most important of the economic criteria, safety and crime rates (C13), comfortable and safe space for pedestrians (C11) and night-time street lighting (C14) were the most important of the social criteria, while clean environment (C4), noise levels (C1) and pollution levels (C2) were seen as the most important of the environmental criteria ( Figure 6).  Overall, respondents see social criteria as the most important for attracting people to pedestrian zones while economic criteria are seen as the least important.
The assessment of these criteria, required to attract (or return) people to city centres, varied with respect to statistical significance only in the case of economic criteria (p < 0.05). It was determined that residents of Klaipeda consider economic and environmental criteria as more statistically significant with respect to making people return. Meanwhile, social criteria were more important to the residents of Vilnius and Kaunas than to the residents of Klaipeda (Figure 7).
Overall, respondents see social criteria as the most important for attracting people to pedestrian zones while economic criteria are seen as the least important.
The assessment of these criteria, required to attract (or return) people to city centres, varied with respect to statistical significance only in the case of economic criteria (p < 0.05). It was determined that residents of Klaipeda consider economic and environmental criteria as more statistically significant with respect to making people return. Meanwhile, social criteria were more important to the residents of Vilnius and Kaunas than to the residents of Klaipeda (Figure 7).  Table 4 presents the assessments of the importance of environmental, economic and social criteria for pedestrian streets in three different cities while Table 4 shows the Kruskal-Wallis test of importance comparison between different cities.   Table 4 presents the assessments of the importance of environmental, economic and social criteria for pedestrian streets in three different cities while Table 4 shows the Kruskal-Wallis test of importance comparison between different cities.  We found that of the economic criteria, residents of Klaipeda viewed job creation (C6) as significantly more important while residents of Vilnius found tourism development (C8) more important (p < 0.05). Among the social criteria, residents of Klaipeda viewed comfortable and safe space for cyclists (C10), space adapted for relaxation and recreation (C12), developing communities (C15), promoting healthy lifestyle (C18) and residential area (C19) as significantly more important, while residents of Vilnius attached significantly more importance to criteria such as night-time street lighting (C14) and cultural space (C17) and residents of Kaunas found cultural activities (C17) and accessibility (C21) to be more important (p < 0.05). Meanwhile, among the environmental criteria, residents of Klaipeda saw noise levels (C1) and pollution levels (C2) as significantly more important while residents of Vilnius attached importance to the presence of trees and green zones (C3) (p < 0.05). See Table 5.  To identify in which city respondents' opinions showed a statistically significant difference, a post-hoc Mann Whitney test was conducted using the significant criteria listed in Table 6. The number of comparisons required was: 3(3 − 1)/2 = 3. Bonferroni adjustment: 0.05/3 = 0.0167 (new alpha/significance level).
By conducting the Mann-Whitney test, the differences in assessments of environmental, economic and social criteria for the main pedestrian streets were determined separately for Vilnius and Kaunas, Vilnius and Klaipeda and Klaipeda and Kaunas (Table 6). After evaluating the differences in assessment of environmental, economic and social criteria between residents of Vilnius and Kaunas with respect to statistical significance, we discovered that, from the economic criteria, residents of Kaunas appreciated economic space (C5) and accessibility (C9) more than residents of Vilnius in terms of statistical significance (p < 0.05). Among the social criteria, residents of Kaunas assessed comfortable and safe space for cyclists (C10), promoting healthy lifestyle (C18) and accessible parking (C21) more highly with respect to statistical significance (p < 0.05). Of the environmental criteria, in terms of statistical significance (p < 0.05), residents of Kaunas found noise protection (C1) and absence of air pollution (C2) more important than residents of Vilnius. Having assessed the statistically significant differences between residents of Vilnius and Kaunas, we determined that with respect to statistical significance, of the economic criteria, residents of Klaipeda valued job creation (C6) more, while residents of Vilnius prioritised tourism development (C8); residents of Klaipeda valued the comfort and safety of space for cyclists (C10), adapting the space for recreation and relaxation (C12), night-time street lighting (C14), developing communities (C15), promoting healthy lifestyle (C18), residential area (C19) and accessible parking (in terms of distance) (C21) more, while residents of Vilnius prioritised cultural spaces (C17) more than residents of Klaipeda. With respect to statistical significance, of the environmental criteria, residents of Klaipeda valued noise protection (C1) and pollution (C2) significantly (p < 0.05) more than residents of Vilnius; however, residents of Vilnius attached more importance to the presence of green spaces (C3) than did residents of Klaipeda.
Having assessed the statistically significant differences between the residents of Kaunas and Klaipeda, we determined that-with respect to statistical significance-of the economic criteria, residents of Kaunas valued economic area (C5), tourism development (C8) and customer friendly parking prices (C9) more than did residents of Klaipeda, but residents of Klaipeda saw job creation as much more significant. Of the social criteria, with respect to statistical significance (p < 0.05), residents of Kaunas found night-time street lighting (C14), cultural spaces (C17) and accessibility via public transportation (C20) more important than did residents of Klaipeda. However, residents of Klaipeda perceived residential area (C19) as more important with respect to statistical significance (p < 0.05). Meanwhile, among the environmental criteria, residents of Klaipeda valued the presence of green zones (C3) much more highly than did residents of Kaunas with respect to statistical significance (p < 0.05). Table 6. Significant differences in perception of criteria contributing to the pedestrian zones based on city.

City Criterion Mann-Whitney Result Rank of Criterion
More important to residents of Vilnius and Kaunas than residents of Klaipeda C14: Night-time street lighting U = 3836.500, p = 0.001 (p < 0.0167) and U = 4050.500, p = 0.006 (p < 0.0167) 3 More important to residents of Vilnius than residents of Klaipeda and more important to residents of Klaipeda than residents of Kaunas C3: Extinction of biodiversity, decrease in green spaces U = 3902.500, p = 0.002 (p < 0.0167) and U = 3855.000, p = 0.001 (p < 0.0167) 5 More important to residents of Klaipeda than residents of Vilnius C2: Air pollution: protected against road transport pollution U = 3648.000, p = 0.000 (p < 0.0167) 6 More important to residents of Vilnius and Kaunas than residents of Klaipeda C8: Tourism development U = 3354.000, p = 0.000 (p < 0.0167) 8 More important to residents of Kaunas and Klaipeda than residents of Vilnius C1: Noise protection: protection against vehicle noise U = 4059.500, p = 0.011 (p < 0.0167) and U = 3724.000, p = 0.000 (p < 0.0167) 9 More important to residents of Vilnius and Kaunas than residents of Klaipeda C17: Cultural space: aesthetic appearance of the streets and buildings, architectural and cultural heritage monuments and their preservation U = 3820.000, p = 0.002 (p < 0.0167) and U = 3827.000, p = 0.002 (p < 0.0167) 11 More important to residents of Kaunas than residents of Vilnius and Klaipeda C20: Accessibility via public transport U = 4046.000, p = 0.010 (p < 0.0167) and U = 3661.500, p = 0.000 (p < 0.0167) 12 More important to residents of Kaunas and Klaipeda than residents of Vilnius C21: Accessible parking (in terms of distance) U = 3081.500, p = 0.000 (p < 0.0167) and U = 3346.000, p = 0.000 (p < 0.0167) 14 More important to residents of Kaunas than residents of Vilnius

Evaluating the Sustainability of Pedestrian Zones Based on the COPRAS Method
Having summarised the survey results, we compiled a solution table, the data from which will be used to evaluate five alternatives (Table 7). In order to determine the importance of the 21 criteria for alternative evaluation, residents of each city were surveyed independently so that we could determine which criteria were the most important to residents of which city. The combined values of criteria importance are used in further calculations (Table 8). Residents of all three cities view social criteria as the most important, with environmental criteria second and economic criteria being the least important (Table 9). Results obtained by evaluating five alternatives based on the COPRAS method are provided in Table 10. The results of the study have shown the sustainability of the pedestrian zone in Kaunas Old Town to be the best, with Laisves Avenue in Kaunas second, Klaipeda Old Town third and Vilnius Old Town and Gediminas Avenue last in terms of the sustainability of pedestrian zones.
Having taken into consideration the fact that the values of alternate indices were determined in accordance with the opinion of the residents of that single city, we can state that residents of Kaunas view the sustainability of pedestrian zones in Kaunas much more positively than residents of Klaipeda or residents of Vilnius view theirs.

Discussion and Conclusions
The survey showed that the majority of urban residents in Lithuania visit pedestrian zones several times a month, while another majority visits pedestrian streets as frequently as several times per week. In the analysed pedestrian zones, residents mostly engage in leisure activities and cultural or other forms of entertainment. Compared to the conclusions and studies conducted by other scientists, these results differ significantly: for example, in the United Kingdom, residents visit pedestrian streets mostly for shopping and work while only a minority go there for leisure [3]. The authors of this paper believe that this might contribute to real estate in pedestrian zones in Vilnius, Kaunas and Klaipeda not being used to their full extent. They contain few establishments that meet residents' needs such as for shopping, so the results of the survey have shown that residents tend to go out for walks on pedestrian streets, while only the minority shop there. This can also be influenced by improvements in technology and tools that enable communication and online shopping which reduce the need for shopping in brick-and-mortar stores and being in a space. This influences the processes of suburbanisation in cities and is likely causing the crisis related to public spaces in cities [62]. However, Rudokas (2013) believes that shopping centres, in shaping a new leisure culture, have caused the public space crisis in Lithuania [63].
This study has also shown that economic criteria such as economic space (commerce and meeting the needs of visitors (the number of shops, cafés and other various establishments)), job creation and customer friendly parking prices are not of much importance to residents of major Lithuanian cities. Economic criteria were the second most important for residents of major Lithuanian cities while tourism development was the most important.
By focusing more on the importance of economic criteria, it is important that residents of Lithuania understand that it is not only tourism that is important to the main pedestrian streets in cities, but also incentives for small and medium businesses, since the latter greatly contribute to the national economic situation and solve employment issues by creating jobs [64]. Despite small and medium businesses constituting as much as 99.8% of all companies operating in Lithuania, according to Statistics Lithuania, small and medium businesses go bankrupt very frequently because, in the author's opinion, of the tax burden being too large. In order to revive pedestrian streets in major Lithuanian cities and attract more visitors, it is essential to incite businesspeople to develop business on pedestrian streets because there are too few opportunities to shop in major Lithuanian cities; with the exception of cafés, there are very few stores. In other countries, shopping opportunities attract more visitors to pedestrian streets [19,62,65]. Regardless of Lithuanian economic development strategies claiming that the state must engage in entrepreneurship policy and create a business-friendly environment by focusing on job creation in new companies as well as developing the service sector, in Lithuania it is especially important to support and facilitate as well as offer exemptions for businesses on streets [62] because of very high rental prices on pedestrian streets [3]. A good business environment would be mutually beneficial: an increase in visitors would not only benefit companies but the state would also get income from sales and jobs.
As mentioned before, economic criteria were the least important to the residents of all three major cities. The most important criteria were social, with environmental criteria second. A convenient and safe space for pedestrians, a space suitable for leisure and recreation, safety and crime rates as well as night-time street lighting were among the most important social criteria. Social criteria are often considered to be the most important for pedestrian streets [4,39,[53][54][55] as more activities lead to more vitality there [23,65]. Safety is also often mentioned because good pedestrian streets must be safe both in terms of motor and non-motor vehicles [54,55], as well as possible crime [6,33].
A clean environment, noise and air pollution are among the most important environmental criteria. As mentioned before, good pedestrian zones must be protected against vehicle noises and pollutants [39] and be clean [48]. However, even though residents of Lithuania do not consider trees and green zones to be very important, preserving green zones is important even in pedestrian zones [43,44]. since green zones protect against noise and pollution, suppressing from 20% to 80% of dust [45].
The results of the study show that the most sustainable pedestrian zone in Lithuania is Kaunas Old Town, then the second sustainable pedestrian zone is Kaunas (Laisves Avenue), the third is Klaipeda Old Town, the fourth is Vilnius Old Town and the fifth is the Gediminas Avenue in Vilnius. The residents of each city assess the criteria that they find the most important best; however, it is evident that there is no significant importance of social, economic or environmental criteria. This shows that residents of Kaunas, Vilnius and Klaipeda find all the aforementioned criteria (environmental, social and economic) important. Thus, in order to improve the image of a city and attract more people, the sustainable development of pedestrian streets is important. The development of the infrastructure of pedestrian zones should be viewed as an investment into complex problem-solving, encompassing economic, social, health, environment, city development and other aspects.
Following the secondary and primary research results, the authors think that for future research it is also essential to study the attitudes of other groups-such as small and medium businesses-towards the importance and significance of social, economic and environmental criteria, also the attitudes of environmentalists and municipal officers towards the importance and significance of particular environmental criteria in the main pedestrian zones in Lithuanian cities.
Author Contributions: Rūta Dičiūnaitė-Rauktienė conducted the interviews, analysed the data and drafted the paper. Virginija Gurskienė contributed to the design of the study and to the draft of the paper. Marija Burinskienė contributed to the data analysis and revision of the paper. Vida Maliene developed the concept and the design of the study, led the development and application of the methodology, analysed data, drafted the paper and led the final revision and improvement of the paper. All authors have read and approved the final version.

Conflicts of Interest:
The authors declare no conflict of interest.