Vehicle safety analysis at non‐signalised intersections at different penetration rates of collision warning systems.

The market penetration of intelligent vehicles is a long‐term process. In recent years, significant attention has been paid to the influence of technology market penetration rate (MPR) on efficiency at signalised intersections, but little attention has been given to such an influence on safety at non‐signalised intersections. In this study, the influence of the intersection collision warning (ICW) system MPR on safety at non‐signalised intersections is investigated. The authors built a Matlab‐based simulation platform where an ICW algorithm was implemented. The simulation was firstly conducted to verify their models. Then the simulation results of different MPRs were obtained and compared statistically. Collision probability, conflict index, and collision rate were analysed for safety evaluation. The overall results showed that vehicle safety at non‐signalised intersections improves with the increase of the ICW system MPR. Without considerations of inappropriateness and otherness of driver reaction to warnings, when the MPR is 20% and all vehicles are connected by vehicle‐to‐everything, the collision probability, conflict index, and collision rate can be reduced by around 20, 20, and 35%, respectively. The simulation method can establish a mapping relation between the ICW system MPRs and vehicle safety indices at non‐signalised intersections. [ABSTRACT FROM AUTHOR]