Models and Calculation Methods for Expected Traffic Delays at Signalized Intersections

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.