高速公路路段通行能力仿真研究

Simulation Analysis of Expressway Capacity

基于VISSIM交通仿真软件可重复性和可延续性的特点,以高速公路交通流运行特征作为分析对象,对通行能力仿真研究的关键参数进行标定与评价.并以标定的VIS-SIM作为平台建立典型的高速公路基本路段仿真模型,再现复杂交通条件下的车流运行特性以及影响通行能力各参数的度量指标.对比现行高速公路服务水平分级标准,分析了产生差别的原因,并由此推算出分级服务水平下的通行能力和交通流临界密度.

Based on the repeatability and the characteristics of the continuity of VISSIM, this paper calibrated the key parameters of the capacity according to the characteristics of the traffic flow of expressways. Based on the calibrated typical basic sections of expressways, the model reproduced the traffic impact under the complex traffic conditions, as well as the measurement indicators which affected the various parameters of the performance of sections of capacity. Compared with the existing standards of the level of service of expressways, the paper analyzed the cause of the difference, and then calculated the capacity and the critical density of each level.