A Framework for Sustainable Transit-Oriented Development in Mid-Sized Cities

Thesis Abstract

Mid-sized cities globally are increasingly confronting rapid urbanization challenges, including traffic congestion, environmental degradation, and socio-economic disparities, which underscore the imperative for sustainable urban development strategies. Despite the recognized potential of transit-oriented development (TOD) to promote sustainable mobility, compact urban form, and economic vitality, there remains a significant gap in comprehensive frameworks tailored to the unique contexts of mid-sized urban environments. This study aims to develop an integrative framework for sustainable TOD specifically adapted to mid-sized cities, with objectives to identify critical determinants influencing successful TOD implementation, evaluate existing planning practices, and propose actionable strategies for sustainable transit integration. The research adopts a mixed-methods design, combining qualitative inquiry with quantitative analysis to achieve depth and breadth in understanding. The qualitative component involves semi-structured interviews with 30 urban planners, policymakers, and transportation practitioners across five mid-sized cities, selected through purposive sampling to ensure representation of diverse geographic and socio-economic contexts. Thematic analysis is employed to extract contextual insights into perceived barriers, enablers, and strategic priorities for TOD. Complementarily, the quantitative component comprises a survey administered to 400 residents within selected transit corridors, employing stratified random sampling to capture varied demographic groups. The survey instrument is validated through pilot testing and reliability analysis (Cronbach's alpha > 0.8). Quantitative data are analyzed using multiple regression analysis to identify significant factors influencing public support and transit ridership, alongside factor analysis to identify underlying dimensions of sustainable TOD. The study further integrates secondary data, including land-use patterns, transit usage statistics, and urban infrastructure metrics, analyzed through spatial econometric techniques such as Geographically Weighted Regression (GWR) to elucidate spatial heterogeneity in TOD outcomes. Theoretically, the research draws upon the Transit-Oriented Development Theory and the Sustainable Urban Form Model to underpin the analytical framework, investigating how planning principles translate into sustainability metrics within mid-sized contexts. Expected findings are anticipated to reveal key determinants—such as land value capture, walkability, community engagement, and integrated land-use and transport planning—that significantly influence the success of TOD projects in mid-sized cities. The study also aims to identify contextual challenges, including institutional fragmentation and funding limitations, alongside effective strategies employed elsewhere. The resulting framework emphasizes participatory planning processes, policy integration, and contextual tailoring of TOD principles, providing a practical tool for urban planners and policymakers. This research contributes new empirical evidence and a contextualized theoretical model to the discourse on sustainable urban development, specifically extending TOD scholarship into mid-sized city environments where existing models are often less applicable. It bridges knowledge gaps regarding contextualized implementation strategies, institutional frameworks, and socio-economic factors influencing sustainability outcomes. The main conclusion underscores the importance of an adaptive, stakeholder-inclusive planning approach, reinforced by strong policy coordination and spatial data utilization. Recommendations include the integration of this framework into city planning policies, capacity-building initiatives for local authorities, and the adoption of spatial analysis tools to monitor TOD impacts over time. It advocates for further research focusing on longitudinal case studies to assess framework efficacy and adaptability across diverse urban landscapes, thereby advancing sustainable transit-oriented development practices tailored to the unique needs of mid-sized cities.