城市快速路多匝道中事故协调控制仿真  

Simulation of Inputting Multi-Ramp Coordinated Control for Urban Expressway under Accident Condition

作　　者：栾燕海 庞明宝[1] 夏泽明[1] LUAN Yan - hai PANG Ming - bao XIA Ze - ming(School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China)

机构地区：[1]河北工业大学土木与交通学院

出　　处：《计算机仿真》2017年第6期147-151,共5页Computer Simulation

基　　金：国家自然科学基金项目(50478088);河北省自然科学基金项目(E2015202266)

摘　　要：交通事故是引起城市快速路拥堵的主要原因之一,多匝道协调控制作为连续交通流道路管理控制的主要策略,现有研究面向一般管控,不涉及交通事故。在STNS模型的基础上,建立由多匝道和主线组成的城市快速路协调控制元胞自动机模型,对事故点上游实施不同匝道控制信号策略的交通流特性进行了仿真,分析不同需求下分别采用不同的信号控制方式对道路交通流的影响。仿真结果表明,多匝道协调控制作为管理的基本手段,只有针对不同需求和交通状态采取不同的控制信号施加策略,才可最大限度地减轻由于事故所造成的拥堵影响,从而实现提高道路流量的目的。Traffic accident is one of the main causes of traffic congestion on urban expressway. The existing research of multi - ramp coordinated control, as the main strategy of road management control in the continuous traffic flow road, faces the general control and does not relate to the accident condition. Based on symmetric two -lane Nagel- Sehreckenberg （STNS） model, a cellular automaton model of coordinated control section on urban expressway with multi - ramp segments, mainline segments and interchange bridges is established. The characteristics of traffic flow under accident condition are discussed via the simulation by using the different control strategies upstream of the accident point. The effects of different traffic demand on actual road capacity are analyzed. The results of the examples indicate that the multi - ramp coordinated control is a basic tool of management for urban expressway, and the impact of congestion caused by traffic accident can be reduced at the utmost only by using the strategy of inputting different control signals under different traffic demands and states. Furthermore, the goat of enhancing road flux can be realized.

关 键 词：元胞自动机模型 交通仿真 多匝道协调控制 城市快速路 交通事故 

分 类 号：U491[交通运输工程—交通运输规划与管理]