The invention provides a VISSIM simulation-based method for determining the length of an accelerating lane in a left entrance ramp confluence area. The method comprises the following steps of: acquiring road parameters and traffic flow data of the left entrance ramp confluence area of an expressway; establishing a VISSIM simulation model and an SSAM conflict model; determining simulation times, performing feasibility analysis and sensitivity analysis of default parameters, and completing calibration of correction parameters; designing acceleration lanes with different lengths and lane numbers,and establishing a corresponding VISSIM simulation model; and comparing the average travel delay and the traffic conflict number of the confluence area in each simulation scheme to obtain a design scheme based on optimal traffic operation efficiency and safety. According to the method, traffic flow characteristics are analyzed from two aspects of confluence area operation efficiency and safety, so that a recommended value of the accelerating lane length of the left-in-ramp confluence area is determined.
本发明提出了一种基于VISSIM仿真的左入匝道合流区加速车道长度确定方法,包括以下步骤:采集快速路左入匝道合流区的道路参数和交通流数据;建立VISSIM仿真模型和SSAM冲突模型;确定仿真次数,进行默认参数的可行性分析和敏感性分析,完成校正参数的标定;设计不同长度和车道数量的加速车道,并建立对应的VISSIM仿真模型;比较各仿真方案中合流区的平均行程延误和交通冲突数,得到基于交通运行效率和安全性最优的设计方案。本方法从合流区运行效率和安全性两个方面分析交通流特征,从而确定左入匝道合流区加速车道长度推荐值。
VISSIM simulation-based method for determining length of accelerating lane in left-in ramp confluence area
一种基于VISSIM仿真的左入匝道合流区加速车道长度确定方法
22.09.2020
Patent
Elektronische Ressource
Chinesisch
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