Quantitative Assessment Framework of Carbon Dioxide Emission Reduction of Public Transport Intervention Policies: A Contextual Analysis of Topographic Relief in Chongqing Central Urban Area

DOI

10.2991/978-94-6463-972-8_10How to use a DOI?

Keywords

Public Transport Accessibility; Carbon Dioxide Emission; Geographically Weighted Random Forest Model

Abstract

Global climate change and urban transportation’s significant contribution to carbon dioxide emissions necessitate context-sensitive strategies for sustainable mobility. While improving public transport construction is a recognized approach to reducing emissions, its effectiveness in cities with complex topography remains underexplored. This study addresses this gap by proposing a quantitative framework to assess the CO₂ reduction potential of accessibility interventions in mountainous urban areas, using Chongqing central urban area—a city characterized by steep slopes—as a case study. The framework integrates terrain-specific variables (e.g., pedestrian slope gradients, elevation), built environment, and public transport accessibility to evaluate the emission impacts of minibus deployments—a terrain-adaptive intervention, and the rail frequency change. Results show that minibuses are most effective in areas with steep terrain (average slope of 30.4% or more) and insufficient public transportation services; in flat (average slope of 15.95% or less) or well-served areas, however, they may cause duplication and higher emissions. In abrupt slope (average slope of 22.8%-30.4%) areas, carbon reduction is moderate due to limited accessibility improvement. Additionally, rail service frequency adjustments yield varying effects: increasing frequency on high-demand corridors like Line 1 significantly reduces emissions by enhancing inter-center connectivity, whereas reducing frequency on lines like the Circle Line can improve efficiency and lower emissions due to oversupply avoidance. These findings underscore that the carbon reduction potential of transport interventions depends on terrain, existing transit density, and service roles.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Linyan Luo
AU  - Tsutomu Suzuki
PY  - 2025
DA  - 2025/12/29
TI  - Quantitative Assessment Framework of Carbon Dioxide Emission Reduction of Public Transport Intervention Policies: A Contextual Analysis of Topographic Relief in Chongqing Central Urban Area
BT  - Proceedings of the 14th Asia-Pacific Conference on Transportation and the Environment (APTE 2025)
PB  - Atlantis Press
SP  - 92
EP  - 102
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-972-8_10
DO  - 10.2991/978-94-6463-972-8_10
ID  - Luo2025
ER  -