城市道路连接交通安全分析与仿真评价研究

连接交通是城市交通的重要节点，也往往是交通事故频发和造成延误的道路瓶颈。优化连接交通组织模式是改善城市交通，特别是提高道路安全水平的一条切实有效的途径。文中结合国外一般分类与我国实际情况，总结了5种基本连接交通组织模式，并对其安全与冲突特征进行分析。基于交通冲突技术，使用冲突数作为安全评价标准；采用Vissim仿真与SSAM软件结合，并用实际录像观测数据标定仿真模型的方法预测冲突数。对5种连接组织模式在流量变化时的安全性进行对比，给出了不同模式的适用性。

Safety Analysis and Simulation Evaluation of Urban Road Access Points

Access points to urban streets are locations of frequent traffic delays and accidents. It is recognized that access management is an effective approach to improving the operation and safety of the access points. Based on the existing literature, this paper classifies the access points into five categories, and uses the traffic conflict technique （TCT） to determine the conflict index as a basis for safety assessment. Using VISSIM aided by the SSAM software and field data in model calibration, the paper evaluates the safety levels of the five types of access points as traffic volume changes. The feasibility of different types is also given.