Simulation and Analysis of Highway Traffic Accident Based on VISSIM

When the highway traffic accident happened, the capacity will decrease, and if the upstream traffic volume was more than the remaining capacity, the traffic jam will happen. The simulation software VISSIM was used to simulate and analyze the highway traffic accident under different number of blocked lane, upstream traffic volume and traffic accident duration. Simulation result shows that, the capacity has something to do with the number of blocked lane, but has nothing to do with the location of traffic accident. The time of biggest delay has something to do with the number of blocked lane and traffic accident duration, but has nothing to do with the upstream traffic volume. The capacity has nothing to do with traffic accident duration. The longer traffic accident duration, the more delay. And the queue length increases when the number of blocked lane, upstream traffic volume and traffic accident duration increase.