Chen, Po-Nien; (2024) Decoding the Impacts of Public Transport Networks on Urban Systems: A Multimodal Spatial Analysis of London and Taipei. Doctoral thesis (Ph.D), UCL (University College London).

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Abstract

The aim of this thesis is to understand and examine the urban form, particularly the integration of the rail network and the urban network in the cities. The transport system of the urban network fundamentally supports movement and stitches activities together. This thesis perceives the cities as an integrated urban network and seeks to enhance the understanding of the urban form, which is represented by the spatial layout of the street and rail networks. In this context, this thesis applies the network analysis from Space Syntax theory and methodology to uncover the network accessibility and the embeddedness of the metro and rail systems. This thesis employs a Multimodal Network Model (MNM), a geodatabase framework that integrates GIS road and railway networks to analyse the geospatial dimensions of transport systems. It adopts a methodological approach that combines travel time distance costs with Space Syntax Angular Segment Analysis to evaluate network accessibility. Furthermore, this research develops an Integrated Urban Model (IUM), which incorporates the MNM alongside land use, traffic, and census datasets to perform cross-sectional spatial data analyses. This approach unveils the configurational effects of urban form on functionality and socio-economic performance. The framework is applied to two case studies, London and Taipei, to examine the interrelationships between railway networks and their urban contexts. This research highlights the vital role of travel time radius constraint and angular distance measures in quantifying accessibility within multimodal urban networks. The developed network analysis facilitates a comprehensive analysis of network structure, emphasising that optimised metro and rail systems are essential for fostering urban mobility and socio-economic activity. The spatial modelling approach, coupled with the enhanced understanding and findings on multimodal network accessibility, makes a significant contribution to urban studies, particularly within the Space Syntax domain. This study not only enriches the methodological capabilities but also provides a framework for addressing the complexities of contemporary urban systems.

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