信号交叉口绿色驾驶车速控制方法

信号交叉口是整个城市交通路网中的瓶颈区域.车流经常在路口停车等候造成怠速行驶，严重降低交叉口的通行效率，同时造成严重的汽车尾气排放污染.为了减轻交叉口对交通流的阻断，合理降低信号交叉口的车辆延误、燃油消耗和污染物排放，本文提出了一种基于多级可变速度限制的信号交叉口绿色驾驶控制方法.该方法以可变速度限制值为控制变量，并基于固定式检测器获取的交叉口附近道路交通状况信息对车辆进行速度限制值的实时发布，以实现在不增加旅行时间的基础上平滑车辆驶近交叉口过程中的时空轨迹.通过MATLAB对该方法进行仿真验证，结果表明，其能够有效地降低交叉口的车辆延误，并减少车辆的燃油消耗与污染物排放量.

A Green Driving Speed Control Method at Signal Intersection

Signal intersection is the traffic distribution interchange in the whole urban traffic road network. Vehicles often stop at an intersection that results in idle driving, severely reduces the intersection traffic efficiency, and causes serious vehicle exhaust pollution. In order to reduce the blocking of traffic flow of intersection, and reduce the delay, fuel consumption and emission of vehicle at signal intersection, this paper proposes a green- driving control method for signal intersection based on multi- level variable speed limit. This method uses the value of variable speed limits as control variable, and utilizes the information of traffic condition near the intersections obtained by fixed detectors to optimize and release the value of variable speed limits in real-time, to smooth the spatio-temporal trajectories without extra travel time in the process of driving to the intersection. Then we made a simulation and verification of this method by combining Newell's following model and VT- micro vehicle fuel consumption and emissions model. The result shows that it can reduce vehicle delay, fuel consumption and pollution emissions effectively.