Characteristic Analysis of Vehicle Speed at Urban Unsignalized Intersection: Taking a Real-World Intersection in Guangzhou as a Case Study

摘要

Understanding the characteristics of vehicle speed is useful to improve the safety of intersections. Firstly, this paper takes the Jiansheda-Jiansheer Road intersection in Guangzhou as the study site and uses the open-source-physics software tracker to extract the samples, by which more than 700 valid samples are collected. Secondly, influential factors of vehicle speed within the intersection are discussed. Thirdly, a multinomial logistic model is proposed to understand the relationship between vehicle speed and its influencing factors. Finally, the range of vehicle speed within unsignalized intersection are studied under different scenarios. Results indicate that the speed of most vehicles at unsignalized intersection is less than 20 km/h. Factors including vehicle type, turning or go straight, stop-line crossing speed, vehicles of conflict directions, and pedestrians of conflict directions significantly impact the speed. Those findings can help to improve traffic facilities and management of unsignalized intersections.