Simulation analysis on traffic safety of signal-coordinated arteries

Abstract

In order to reduce accidents of signal ̄coordinated arteriesꎬ changes of traffic safety performance before and after adopting coordinated signal control on arteries were explored. Thenꎬ with data from Shuhan road in Chengdu collectedꎬ SSAM was established based on traffic simulation conflicts. Finallyꎬ a kernel regression model was used to fit simulated traffic conflictsꎬ and safety of arteries before and after coordinated signal control was evaluated based on fitting results. The results show that arteries with signal ̄coordinated control comparatively has worse safety performance when traffic volume is under 3 864 pcu / h. There are more conflicts as small cars reach a too high or too low proportion(P<0􀆰 73 or P> 0􀆰 83) in traffic flowꎬ and signal ̄coordinated arteries have fewer crossing conflicts and more rear ̄end conflicts.