基于微观仿真的复合式断面高速公路通行能力计算模型研究

Research on Calculation Model of Traffic Capacity of Expressway with Combined Type Cross Section Basing on Microscopic Simulation

复合式断面高速公路断面组成和交通组织方式与传统高速公路均有所差别,其通行能力影响因素和计算方法也有所不同。首先结合复合式断面高速公路横断面特点,在分析主辅分离和客货分离两种交通组织方式下通行能力影响因素的基础上,提出通行能力计算模型,以京哈高速公路绥中至沈阳段交通数据为基础,考虑各影响因素,利用VISSIM交通仿真平台建立仿真模型,根据仿真得到的速度-流量曲线给出各修正系数的标定值,最后给出计算实例供相关人员参考。

The composition of cross section of expressway with combined type cross section and traffic organization mode are different from those of traditional expressway, and the influencing factors and calculation methods of its traffic capacity are also different. First, in combination with cross section features of expressway with combined type cross section , the calculation model of traffic capacity is put forward basing on the analysis on influencing factor of traffic capacity under two kinds of traffic organization modes like separation between mainstay and auxiliary business and separation of passenger and freight. Basing on traffic data from Suizhong to Shenyang section of Jingha Expressway, all kinds of influencing factors are considered. The simulation model is established by utilizing VISSIM traffic simulation platform, the calibration value of each correction factor is given according to speed - flow curve obtained from the simulation, so as to provide living examples of calculation to related personnel for reference.