高速公路协调控制信号施加策略  

Strategies of Inputting Coordinated Control Signal for Freeway

作　　者：庞明宝[1] 杨敏[1] 张莎莎[1] 

机构地区：[1]河北工业大学土木工程学院,天津300401

出　　处：《公路交通科技》2014年第1期131-138,共8页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(50478088);河北省自然科学基金项目(E2011202073)

摘　　要：研究高速公路协调控制信号施加策略问题。在STNS模型的基础上,建立可利用智能交通系统实时信息由一个入口匝道和一段主线组成的高速公路区段协调控制元胞自动机模型,对该区段实施不同控制信号策略的交通流特性进行了仿真。分析了不同的交通状态、主线上游流量和匝道需求下,分别实施不施加控制信号、仅施加匝道控制信号、仅施加可变速度限制信号、匝道控制和可变速度限制信号均施加4种方式对道路实际通行能力和交通流的影响。结果表明:协调控制作为高速公路管理控制的主要手段,具有较好的适用性,针对不同交通需求,分别采取不同的控制信号施加策略,可达到减少车辆总通行时间、抑制交通拥堵从而提高道路实际通行能力的目的。The strategies of inputting coordinated control signal for freeway are studied. Based on symmetric two-lane Nagel-Schreckenberg （STNS） model, a cellular automaton model of coordinated control section on freeway with only one on-ramp segment and a mainline segment is established with access to real-time traffic information of ITS. The characteristics of traffic flow obtained by inputting coordinated control signals in the controlled section are discussed via the simulation experiments by using different control strategies. The impacts on actual road capacity and traffic flow are analyzed under different traffic states, mainline upstream traffic volume and ramp demand by inputting no control signal, only inputting on-ramp control signal, only inputting variable speed limit signal, inputting speed limit signal and ramp metering signal respectively. The results of the examples show that （1） the applicability of coordinated control as a main traffic management tool is better than that of other control methods; （2） the goal of decreasing passing time of vehicles, suppressing traffic jams and enhancing road actual traffic volume can be realized by using the strategy of inputting different control signals under different traffic demands.

关 键 词：智能交通系统 高速公路 元胞自动机模型 协调控制 匝道控制 可变速度限制 

分 类 号：U491.51[交通运输工程—交通运输规划与管理]