Simulation and analysis of non-recurrent traffic congestion triggered by crashes in road networks using a grid-based approach

Sulan Li,Xiedong Zhang,Hongwei Zhu,Junqing Shi,Guolian Meng

doi:10.1177/1687814019884166

Abstract

The non-recurrent traffic congestion triggered by crashes is one of the most important factors that undermine the traffic efficiency of urban road networks. In this article, an improved cellular automaton model was proposed to simulate the non-recurrent congestion triggered by crashes in grid networks with signalized intersections. Four rules were adopted to represent vehicle movements on road sections and intersections. The network speed is adopted to capture the propagation and dissipation of the non-recurrent congestion. The effect of main influencing factors of crashes on the road network was evaluated through the simulation. Simulation results showed the incident duration and areas affected by the distance between the crash point and the upstream intersection, the number of closed lanes, and the crash duration. In addition, the stop-start wave was observed in the simulation. The realistic findings from the simulations validated the model to have the potential for practical applications in the analysis of the non-recurrent congestion triggered by crashes.

Highlights

Nowadays, the congestion problem has become a major and costly problem in many countries due to the rapid increase in the automobile ownership
This article established an improved cellular automaton (CA) model for the simulation of the non-recurrent congestion triggered by crashes in road networks with signalized intersections
The proposed model can be used to investigate the effects of the number of vehicles, the distance between the crash point and the upstream intersection, the severity of the crash, and the traffic duration on the nonrecurrent congestion

Summary

Introduction

The congestion problem has become a major and costly problem in many countries due to the rapid increase in the automobile ownership. The CA model is improved to simulate the effect of the network traffic density, the crash’s position on the road section, and the crash duration, on the network traffic mobility. Let xn and vn be the position and speed of the nth vehicle on a given road section.

Results

Conclusion