文章编号： 1672-5328（2025）01-0016-10

张娜，刘丙乾，陈青尧，周垠，李星
(成都市规划设计研究院，四川成都610041)

摘要： 公共交通可达性对衡量城市公共交通系统供给服务水平、识别并改善待优化区域起到积极促 进作用。概述公共交通可达性水平(PTAL)分析技术体系及国内外应用实践，对公共交通出行全过程 进行拆解，识别出步行、等候、乘车、换乘等一系列关键出行环节；结合在线地图公共交通路径规 划API 对公共交通网络运营信息进行本地化存储，通过对出行过程进行分阶段模拟，探索以快捷出 行为原则的公共交通路径规划技术，实现栅格间公共交通出行时间精细模拟和PTAL快速计算。以 成都市为例，结合插值算法得出成都市中心城区高精度PTAL地图，结果显示PTAL空间分布格局 与城市轨道交通线网的耦合度较高。与直接调用百度地图公共交通路径规划服务相比，提出的方法 在准确度和规模化应用上均具备显著优势，可用于公共交通供给服务水平衡量或对用地与公共交通 发展协调程度进行评估。

关键词： 公共交通；可达性；出行全过程；公共交通路径规划；成都市

中图分类号： U491.1+7

文献标识码：A

Calculation Method for Public Transit Accessibility Level Oriented Towards the Entire Travel Process: A Case Study of Chengdu

ZHANG Na, LIU Bingqian, CHEN Qingyao, ZHOU Yin, LI Xing
(Chengdu Institute of Planning & Design, Chengdu Sichuan 610041, China)

Abstract： Public transit accessibility plays a positive and vital role in evaluating the service level of urban public transit systems and identifying areas for improvement. This paper presents an overview of the technical analysis framework for the Public Transport Accessibility Level (PTAL) and its domestic and international application practices. The paper deconstructs the entire travel process of public transit and identifies a series of key segments, including walking, waiting, riding, and transferring. By integrating the public transit route planning API of online maps and locally storing public transit network operation data, as well as simulating the travel process in stages, the paper explores a public transit route planning method based on the principle of fast and convenient travel. The method achieves fine simulation of travel times between grid cells and facilitates with rapid PTAL calculation. Using Chengdu as a case study, the paper introduces a high-resolution PTAL map of the central urban area using interpolation algorithms. The results reveal a high coupling degree between the spatial distribution pattern of PTAL and the urban rail transit network. Compared to directly using the public transit route planning service of Baidu Map, the proposed method offers significant advantages in accuracy and large-scale application. It can be employed to evaluate the level of service of public transit or the coordination between land use and public transit development.

Keywords： public transit; accessibility; entire travel process; public transit route planning; Chengdu