Research on the Theoretical Framework of Green Urban Rail Transit at the Network Planning Level.

To implement the requirements of "Building a Strong Transportation Nation" and the "Dual-Carbon Goals", and guided by the "Action Plan for Green Urban Rail Transit Development in Chinese Cities", this study explores green and low-carbon analysis and evaluation methods in the rail network planning stage from three aspects: urban space, integrated transportation, and rail transit. A comprehensive theoretical framework was systematically constructed, covering macro to micro levels. The analysis process employed various methods, including model building, spatial econometrics, geographic analysis, and passenger flow prediction, to establish a theoretical structure for the green and low-carbon effects of rail transit through both quantitative and qualitative approaches. The study proposed a tripartite green development framework integrating "City-Transportation-Railway", forming a primarily quantitative evaluation index system that effectively promotes green travel. This system aligned with higher-level planning while considering the unique characteristics of rail transit, guiding the next phase of green urban rail implementation and related research. The research results demonstrated that combining elements of rail network planning with urban and integrated transportation could effectively and quantitatively reflect green development goals. The calculation methods for evaluation indicators were feasible, operational, and comparable. This framework not only meets the requirements and goals of national land spatial planning and integrated transportation planning but also provides valuable guidance for subsequent stages of construction planning, feasibility studies, and preliminary designs in green development. Furthermore, it aligns well with the entire planning and design process of rail transit. The conclusions and recommendations from this study can be effectively incorporated into national land spatial planning and integrated transportation planning to ensure a unified planning blueprint. [ABSTRACT FROM AUTHOR]