Search Results (723)

Smart cities have emerged as a strategic approach to enhancing urban sustainability through the integration of digital technologies, intelligent infrastructure, and data-driven governance. However, limited research has comprehensively examined how technological, institutional, governance, and contextual factors interact to influence sustainability outcomes in industrial-city settings, particularly in Saudi Arabia. This study develops an integrated conceptual framework for sustainable smart industrial cities through a qualitative research design based on a systematic screening and synthesis of the literature, complemented by a contextual analysis of the Dammam Metropolitan Area (DMA) as an illustrative urban-industrial case under Saudi Vision 2030. A total of 86 articles, reports, and website materials were identified and screened, of which 49 sources met the inclusion criteria and were synthesized to develop the proposed framework. The analysis examined five interrelated components: smart-city applications, institutional governance, implementation conditions, contextual barriers and opportunities, and sustainability outcomes across three dimensions: environmental, social, and economic. The findings suggest that the effectiveness of smart-city applications depends not only on technological innovation but also on institutional governance, digital readiness, stakeholder participation, integrated planning, and supportive regulatory environments. The study further identifies fragmented governance, limited institutional coordination, cybersecurity risks, and high infrastructure costs as key implementation barriers, while highlighting opportunities associated with Saudi Vision 2030, digital-transformation initiatives, and circular-economy principles. The principal contribution of the study is the development of an integrated conceptual framework that explains the interactions among these five components and provides a theoretical foundation for future empirical validation, as well as conceptually informed guidance for policy development and planning in Saudi Arabia and comparable industrial-city contexts. Full article

Rapid urbanisation across the Global South has intensified contestation over sidewalk space, where formal planning collides with informal livelihoods. Street vending, central to the urban economy, is routinely framed as disorder and met with exclusionary interventions that overlook its socio-spatial logic. This paper asks who holds the right to the sidewalk in intermediary cities, and how planning can move from displacement toward negotiated coexistence. Using Ben Guerir, Morocco, as a case, the study integrates Space Syntax (global integration Rn, ArcGIS Pro), 60 h of behavioural mapping across 18 sessions recording 158 vendors in three daily time-bands, and a stratified perception survey (n = 120: 60 pedestrians, 30 vendors, 30 shopkeepers). Vending concentrates in the most integrated segments of the urban grid, follows pedestrian rhythms across the day, and persists despite the formal Souk Al Karama market, which remains underutilised due to its spatial isolation. The contribution is threefold: (i) extending Space Syntax and Right to the City scholarship to an under-studied intermediary-city context; (ii) showing empirically that informal vending is a spatially rational adaptation to urban accessibility, not encroachment; and (iii) translating findings into operational principles for inclusive sidewalk governance, advancing Sustainable Development Goals 8 and 11. Full article

This PRISMA-guided scoping review examines the use of waste materials in civil engineering as a sustainable approach to reducing environmental impacts, conserving natural resources, and supporting circular economy principles. The rapid growth of urbanization, industrialization, mining, and agricultural activities generates large amounts of waste materials, including fly ash, ground granulated blast-furnace slag, bauxite residue, mining tailings, waste rock, acid-mine drainage sludge, waste plastics, post-consumer vulcanized rubber, recycled construction materials, and agricultural ashes. The disposal of these materials often creates serious environmental and land-use problems, making their reuse increasingly important. In this context, civil engineering is one of the most promising sectors for large-scale waste valorization because of its high material demand and its ability to use different waste streams into practical applications such as concrete and cementitious systems, pavement and asphalt engineering, geotechnical works, and other infrastructure sectors. This review critically evaluates the global availability, material characteristics, engineering applications, environmental and economic benefits, recent advances, and key challenges related to major industrial, mining, agricultural, polymeric, and construction-derived wastes. Although significant progress has been made in this field, wider implementation is still limited by variations in material properties, technical and environmental challenges, economic constraints, and limited field validation of long-term performance. By bringing together current knowledge from different waste streams and civil engineering sectors, this review highlights important research gaps and future directions to support more sustainable, resilient, and resource-efficient infrastructure development. The effective use of waste materials in civil engineering can play an important role in reducing carbon emissions, improving resource efficiency, and supporting global sustainability. Full article

Digital Twins (DT) are increasingly positioned as key enablers of sustainable urban development, yet many implementations remain fragmented, technology-driven, and weakly connected to clearly defined decision-making needs. The present study develops a structured information governance framework for DTs, drawing on the principles of ISO 19650. The framework establishes a traceable hierarchy linking organizational objectives, DT use cases, information requirements, the Level of Information Need, information exchange processes and machine-readable Information Delivery Specifications. Its purpose is to ensure that information is clearly defined, exchanged, validated, and maintained in a consistent and verifiable manner before it is used for monitoring, simulation, predictive analytics, or decision support. The proposal is illustrated through an urban air-quality Digital Shadow demonstrator integrating BIM, GIS, weather services, and a real-time visualization environment. Candidate information-quality indicators are also introduced and demonstrated through synthetic calculations intended to explain their application. Neither the demonstrator nor the calculated KPI values constitute validation of the framework or evidence of improved operational performance. Instead, they establish a structured basis for future testing in operational Urban Digital Twin (UDT) implementations. The contribution lies in integrating established BIM concepts into a single DT-oriented traceability chain rather than introducing them as new standards or methods. Full article

This paper develops a literature-grounded review on connecting circular economy (CE) principles and urban mobility to examine how smart city transportation can be reshaped through durable design, reuse, service-based models, and materials stewardship. A structured review of indexed documents (2010–April 2026) from Scopus and Web of Science identified a set of papers that were screened, thematically grouped into six clusters (design, digital infrastructures, shared mobility, materials management, social inclusion, decision support), and synthesized via textual analysis to generate an integrative, evidence-based conceptual framework, identify empirical and methodological gaps, and propose policy-relevant research priorities informed by the identified topics. The literature documents CE interventions and analytical methods that can lower embodied impacts, raise asset utilization, and recover secondary materials when backed by clear public policies, coordinated governance, and digital platforms. Key limitations include fragmented governance, optimistic recovery rate assumptions, limited integration of life cycle analyses, and weak empirical evidence linking participatory processes to measurable outcomes. The findings are relevant to researchers, planners, policymakers, and practitioners, and indicate that operationalizing circular approaches in urban mobility requires cross-sectoral policy alignment, data governance, financing reform, inclusive stakeholder engagement, interoperable platforms, and longitudinal place-based pilots with multi-metric monitoring aligned with the Sustainable Development Goals. Full article

This study develops and applies an adapted New Urbanism–Transit-Oriented Development (NU–TOD) framework to evaluate spatial, functional, and climatic performance in Al Malqa District, Riyadh. Integrating NU–TOD principles with hot-arid microclimate research, Saudi sociocultural norms, and Vision 2030 governance, the study employs a convergent mixed-methods design that combines Geographic Information Systems (GIS)-based land-use and network analyses, shading and microclimate indicators, and policy review. Results show that Al Malqa benefits from strong civic anchors and proximity to a Line 1 metro station but exhibits limited walkability, low station-area densities, constrained mixed-use intensity, and insufficient shading, which together reduce effective walking catchments and transit viability. A phased intervention strategy is proposed: short-term shading and feeder-mobility improvements; medium-term TOD zoning, parking reform, and public-realm upgrades; and long-term mixed-use redevelopment and district-scale green infrastructure. A reproducible Multi-criteria Decision Analysis (MCDA) feasibility assessment (impact, regulatory ease, cost, timeline) prioritises shaded pedestrian corridors and feeder mobility as the most implementable early actions. The study contributes a replicable evaluation model for hot-arid cities and offers actionable guidance for Vision 2030, aligned with suburban intensification in Riyadh. Full article

Over the past fifty years, urban and rural spaces have been reshaped by global sustainability policies, digital innovation, and emerging socio-ecological needs. This article investigates the convergence of agro-urban planning strategies, Smart City infrastructures, and adaptive governance models, proposing an integrated agro-urban paradigm for sustainable territorial transformation. Drawing on a literature review and comparative analysis of international case studies—including Toronto, Milan, and Woven City—the research develops a triadic interpretative framework based on worldview, program, and faith. The study identifies AgroCities as systems centered on food sovereignty and ecological resilience, Smart Cities as efficiency-driven digital ecosystems, and Adaptive Cities as flexible, human-centered responses to complexity. Findings suggest that integrating food systems, technological innovation, and participatory governance enhances urban resilience and sustainability across scales. The article concludes by advocating for multi-scalar planning tools, cross-sectoral policies, and civic engagement to support the transition toward inclusive and regenerative cities. This framework offers a theoretical and operational contribution to reimagining urban planning in line with the principles of Smart Land and adaptive urbanism. Full article

Urbanization in Northern Nigeria has accelerated the adoption of modern architectural forms that often neglect climatic responsiveness and indigenous cultural values. This study examines how vernacular architectural principles can be integrated into contemporary urban development to enhance climate resilience. Focusing on Sokoto, Katsina, and Kano, the research adopts a mixed-methods approach combining field measurements, simulation modeling, structured interviews, and policy analysis. Findings indicate that traditional Hausa architecture achieves indoor temperature reductions of 4–6 °C compared to ambient outdoor conditions. This is primarily due to courtyard configurations, high thermal mass, and passive ventilation strategies associated with the architecture. Life-cycle assessment reveals that vernacular materials exhibit 60–75% lower embodied energy than modern buildings. Despite these advantages, policy frameworks inadequately support their integration. This study proposes an integrative model combining vernacular strategies with modern technologies and policy reforms. The findings contribute to sustainable urban design discourse and align with global sustainability goals. Full article

Adopted by UNESCO in 2011, the Historic Urban Landscape (HUL) Recommendation consolidated earlier traditions of urban heritage conservation into a policy-oriented framework for managing change in historic cities. This embedded heritage management within sustainable urban development agendas, governance, and implementation tools. A review of HUL-related scholarship spanning from 2010 to 2024 sets the main focus of the current paper. The research engages two complementary perspectives: a bibliometric analysis of 172 publications drawn from ScienceDirect and ProQuest, and a bibliographic (thematic) review of 50 works, systematically isolated from the larger corpus, that directly engage with the concept. This study investigates how the HUL concept has evolved conceptually, how it has been interpreted across different research traditions, and to what extent current scholarship reflects or advances its intended methodological and operational scope. Bibliometric mapping was conducted using VOSviewer, supported by metadata generated in Zotero and organised through subsequent Excel classification, while the literature analysis employed a structured interpretive framework. Findings reveal that although direct references to the “HUL approach” remain limited, research frequently aligns with its core principles—sustainability, adaptive reuse, identity, and intangible values. Since 2019, case studies have expanded rapidly, spearheaded by projects carried out in China and Italy, marking a clear shift from theoretical elaboration to practical application. This transition has redirected scholarly attention from conceptual debates to the real-world challenges of participation, integration of local data, and balancing heritage management with urban development. The study concludes that effective HUL practice requires a professional mindset rooted in flexibility, interdisciplinarity, and continuous adaptation rather than prescriptive, checklist-driven methodologies. Full article

The rapid transformation of urban centers into smart environments introduces complex challenges at the intersection of technological advancement, environmental stewardship, and social justice. This study evaluates Lisbon’s smart city transition by establishing an integrated framework that links digital equity with Environmental, Social, and Governance principles. Employing a convergent qualitative research design, this paper triangulates a comprehensive regulatory policy analysis with primary empirical data gathered from twenty-five semi-structured interviews with municipal officials, academic experts, and residents of marginalized communities. The findings expose critical systemic disparities in digital infrastructure deployment, device affordability, and platform literacy across socio-economic strata, demonstrating how localized digital divides directly impede the execution of urban ESG objectives. While green financing mechanisms offer robust pathways for sustainable energy and transit infrastructure, their equity outcomes remain constrained without mandatory, transparent information disclosure systems that mitigate agency costs. Cultivating urban resilience requires shifting from tokenistic e-governance to genuine citizen empowerment. This study offers a novel theoretical contribution by operationalizing corporate ESG metrics within public urban governance frameworks, providing an empirical roadmap for municipal policymakers globally to balance digital innovation with structural inclusion and environmental accountability in smart city agendas. Full article

The use of European Sustainability Reporting Standards (ESRS) under the Corporate Sustainability Reporting Directive (CSRD) represents a major change in corporate sustainability reporting, particularly through the formalisation of the double materiality principle. Despite its regulatory relevance, empirical evidence on how organisations disclose double materiality remains limited, especially during the first reporting cycle. This study provides early empirical indicative evidence on the application of double materiality in disclosure following the initial ESRS reporting. It examines how leading European water-sector companies and environmental service providers with urban water activities integrated this approach into their 2024 sustainability disclosures. A mixed-methods design is applied, combining qualitative content analysis with descriptive quantitative checks of sustainability, ESG, and integrated reports. The disclosed material topics are assessed against the ESRS thematic framework. The findings indicate a strong convergence on the key environmental issues reported, notably climate change, water management, and circular economy-disclosed practices, including companies not yet fully subject to ESRS requirements. In contrast, social and governance disclosures suggest greater heterogeneity. Overall, the results suggest that broader material coverage does not necessarily imply higher information quality, as this reflects the breadth of disclosure rather than its quality, reinforcing double materiality as a sector-driven prioritisation mechanism. Full article

The Sustainable Development Goals (SDGs) Prosperity Cluster (SDGs 7–11) represents a multidimensional framework linking economic growth, social inclusion, environmental sustainability, and resilient development. This review critically examines the interconnections among Affordable and Clean Energy (SDG 7), Decent Work and Economic Growth (SDG 8), Industry, Innovation and Infrastructure (SDG 9), Reduced Inequalities (SDG 10), and Sustainable Cities and Communities (SDG 11), with the aim of exploring how these goals collectively contribute to sustainable prosperity. Adopting a structured literature review methodology informed by PRISMA principles, the study synthesizes peer-reviewed and gray literature collected from major academic databases and institutional sources. The findings indicate that progress toward the prosperity-oriented SDGs remains uneven across regions due to disparities in governance quality, technological capacity, infrastructure development, and social inclusion. Renewable energy transitions, digital innovation, circular economy initiatives, green infrastructure, and sustainable urban planning emerge as critical drivers of long-term prosperity, while inequality, weak institutional coordination, inadequate human-capital investment, and uneven access to technology remain major barriers. The review further demonstrates that progress in one SDG strongly influences outcomes in others, emphasizing the importance of integrated and policy-coherent approaches rather than isolated sectoral actions. Conceptually, the paper advances the understanding of the “Prosperity Cluster” by positioning dynamism, equity, and environmental stewardship as mutually reinforcing dimensions of sustainable development. The study concludes that achieving sustainable prosperity requires governance systems capable of balancing economic competitiveness with environmental responsibility and social justice. Greater international cooperation, inclusive policymaking, and investment in resilient infrastructure and human capital are essential to ensure that prosperity benefits present and future generations without leaving vulnerable populations behind. Full article

Accurate and up-to-date mapping of built-up areas is of great importance for sustainable urban planning, disaster management, and the monitoring of environmental changes. In this study, a residual U-Net-based deep learning architecture named FiveBandTTA is proposed for built-up area segmentation from Sentinel-2 multispectral satellite imagery. The proposed model aims to simultaneously learn spatial and spectral features by jointly processing RGB, NIR (B8), and SWIR (B11) bands within the same encoder–decoder structure. The model incorporates standard residual blocks following the conventional residual learning principle, multi-level skip connection mechanisms, and TTA-based inference strategies. Within the scope of the study, a multi-temporal built-up area dataset was constructed from Sentinel-2 imagery acquired over Kocaeli Province. The performance of the proposed model was comparatively evaluated against RGB Baseline, FiveBand Single, DeepLabV3+, and SegFormer models. Experimental results demonstrated that the proposed model achieved the highest segmentation performance among all compared approaches, obtaining 0.8447 IoU, 0.9124 Dice, and 0.9249 Precision scores. It was observed that the use of multispectral bands together with the residual encoder–decoder structure may contribute to improved representation of small-scale built-up regions and complex boundary structures. Furthermore, the comparative experiments indicated that the NIR and SWIR bands provide complementary spectral information for distinguishing built-up areas, while the TTA-based inference strategy may contribute to improved segmentation stability and prediction consistency. Overall, the obtained results demonstrate that the proposed approach is an effective and robust method for built-up area segmentation from medium-resolution Sentinel-2 imagery. Full article

Smart Mobility plays a key role in Smart Cities, given its ability to support the rollout of intelligent transport systems, allowing for more sustainable urban transportation and greater interoperability across diverse mobility modes. Furthermore, Smart Mobility is essential to maximize the quality of life for the community while advancing principles of sustainability, economic development, technological innovation, and collaborative governance. Real-Time Traffic Management (RTTM) emerges as a vital technology for optimizing traffic management in Smart Mobility. Using the PRISMA framework, the proposed systematic literature review examines 165 peer-reviewed publications related to RTTM research work published between 2019 and 2025. This review identified eleven application domains, with Urban Traffic Management Systems (36.97%) and Artificial Intelligence (AI) and Predictive Analytics (12.73%) representing the most prominent areas. A retrospective analysis of the literature on control architecture used in closed-loop feedback systems indicates that most studies (89%) have adopted a more dynamic control model, while 7.8% adopted a Digital Twin (DT)-based approach. However, several implementation barriers persist, including limited integration of online optimization and learning loops into RTTM systems, gaps in performance comparisons between simulation and reality, scalability issues due to heterogeneous environments, inconsistent data quality caused by various sensor types, and difficulties integrating sensors into a control system. In addition, this paper proposes a taxonomy of RTTM applications and control architectures, while outlining key practical barriers to implementation and charting future research directions for advancing Smart Mobility through robust RTTM. Full article

Electrification of public transit is central to sustainable urban development, yet it introduces passenger exposure to extremely low-frequency magnetic fields (ELF-MFs), which the International Agency for Research on Cancer (IARC) classifies as possibly carcinogenic to humans (Group 2B). This study presents a systematic cross-platform comparison of ELF-MF exposure in direct current (DC) light rail and alternating current (AC) heavy rail systems operating under a single national regulatory framework. A total of 9100 continuous measurements were collected across 28 trips on the Tel Aviv Red Line light rail transit (1500 V DC) and the Israel Railways Tel Aviv–Binyamina corridor (25 kV, 50 Hz AC) during 23–26 November 2025, using calibrated Tenmars TM-192D gaussmeters. Mean passenger seat magnetic flux density was 0.226 ± 0.147 µT (2.26 ± 1.47 mG) for the DC system and 0.900 ± 0.606 µT (9.00 ± 6.06 mG) for the AC system. The difference was highly significant (Welch’s t = −73.06, p < 0.001). DC light rail exposure remained consistently below Israel’s precautionary 0.4 µT (4 mG) threshold for continuous public exposure, whereas AC heavy rail mean levels exceeded this threshold in every monitored trip while remaining far below ICNIRP general public reference levels. These findings highlight a “Green Dilemma” in sustainable transport policy: the environmental benefits of rail electrification must be balanced with prudent electromagnetic exposure management in jurisdictions applying strict precautionary limits. Full article