基于交通仿真技术的二级公路安全评价方法

A Safety Evaluation Method for Secondary Highway Based on Traffic Simulation Technology

二级公路是我国公路系统的重要组成部分。本文根据现场观测结果,以二级公路交通流特性为基础,比较传统安全评价方法,采取基于第85位运行速度差的方法评价二级公路的安全性。考虑二级公路交通组成复杂的特点,运用交通仿真技术建立路网对象,结合现场观测数据完成参数标定,模拟实际交通流运行状况,输出评价指标数据,提出了区别于《公路项目安全性评价指南》所述获取运行速度差的方法。实例研究表明,该方法简单易用、精度较高,且适用范围广。

The secondary highway is an important part of China＇s highway system. According to the field survey,and based on the traffic flow characteristics on the secondary highway,this paper evaluated the secondary highway safety with the method of 85th operational velocity difference. Considering the complexity of the secondary highway＇s trafficcomposition,the parameters were calibrated combined with the data of field survey. This paper used simulation technology to set up the real traffic flow in the road network,and outputted the evaluation data. This method is different to the 《Guidelines of Safety Evaluation of Highway Item》proposed. The results indicated that this method was simple to use and of great precision.