Impact of the Uncertainty of Velocity Information on Rear-end Collision in V2V Communication Environment

Abstract

In this study, the simplified desired safety margin (DSM) model as a car-following strategy is introduced. Based on this, we introduce an uncertainty level of velocity information (ULVI) parameter in the DSM model. Three scenarios as starting, stopping, and car-following processes are set to investigate the impact of ULVI on rear-end collision in V2V communication environment. Results show that a negative ULVI value can reduce rear-end collision risk during starting process compared with two scenarios of stopping and car-following processes. Furthermore, ULVI is not conducive to reducing rear-end collision risk during car-following process unless ULVI with a negative random value exists throughout the entirety of the car-following process. Therefore, ULVI plays a key role in car-following safety in ACC or automotive platoon driving. Findings are useful for designing different control strategies in different traffic scenarios by considering the effect of ULVI that reduce rear-end collision risk in ACC or automotive platoon driving.