关键词: 城市交通；美国 HCM 运行分析法；通行能力；仿真分析

Abstract: To enhance the efficiency and capacity of road intersections, this article takes urban road intersections as the research object. By combining the results of on-site data collection and relevant evaluation indicators, and using the operational analysis method of the Highway Capacity Manual (HCM) of the United States, the traffic capacity of the intersections is systematically evaluated. Based on this, targeted improvement measures are proposed, and their implementation effects are analyzed and evaluated in depth to further enhance the traffic capacity of the intersections. The research first analyzes the regional functions of the intersections, the layout of the road network, the signal timing, and the traffic flow characteristics of the sections. It selects traffic volume and service level as the core evaluation indicators, clarifies the evaluation methods and related influencing factors, and thereby calculates the current traffic volume and service level of the intersections. In response to the existing problems of this intersection, the research optimizes the signal timing scheme and uses traffic simulation methods to verify the improvement effects of the traffic capacity and service level after optimization. The research aims to improve the travel experience of residents through scientific optimization of traffic flow organization, enhancing traffic smoothness, and reducing the risk of traffic accidents.

Key words: urban transportation; American HCM operation analysis method; traffic capacity; simulation analysis