信号交叉口期望交通延误模型及计算方法研究

Models and Calculation Methods for Expected Traffic Delays at Signalized Intersections

目前大多数信控交叉口交通延误模型仅对一个进口进行分析,本文提出了交叉口各进口在同一个信号周期内的期望交通延误分析方法.针对交叉口各进口同时处于非饱和交通状况,推导建立了能够体现交叉口延误与信控参数、车辆到达率、车辆排队长度等参数之间动态关系的微观延误模型.将其应用于长沙市解放西路与建湘路信控交叉口的延误计算,并与点样本法、HCM2000法的计算结果比较,表明本模型在信控交叉口延误计算分析中具有较好的精确度和适用性.

Previous traffic delay models at signal control intersections are usually formulated according to a single approach.This paper presents the delay analysis methods for vehicles at signal control intersections which are referred to all the approaches in the same signal cycle.Under the non-saturated traffic conditions of intersection approaches,the microscopic traffic delay model are proposed and deduced.It shows the dynamic relationship between the expected signal intersection delay and the parameters of signal control,vehicle arrival rate and the queue length.The Changsha Jiefang west Rd/ Jianxiang Rd intersection is taken as an example to calculate the intersection delay by the model.The results are compared with the calculation results of HCM2000 and spot sample method,which show that the deduced model can be used as an effective way to analyze and evaluate the traffic delay at the signalized intersection.