Simulation-Based Impact Assessment of C-ITS Services: Application to Road Works Warning Use Case

Cooperative Intelligent Transport Systems services are designed to enhance road safety, traffic efficiency, and reduce vehicle impact on the environment. In this paper, we focus on evaluating the impact of C-ITS services, specifically, we evaluate the case of signaling road works zones on highways. We adopt a simulation-based evaluation methodology using the Simulation of Urban MObility (SUMO) traffic simulator. The novelty of this study lies in modeling response delays for drivers using C-ITS services within the simulation framework. The purpose is to mimic the behavior of a driver receiving a C-ITS notification with recommendation to anticipate a lane change while approaching work zones. The impact assessment was performed with a distinction between CVs (Connected Vehicles) and non-CVs. The study highlights that Road Works warnings with lane-change recommendations can be highly beneficial in low-traffic demand scenarios but should not be broadcast in high-traffic demand scenarios and should be replaced with more adequate messages without lane change recommendation, such as, traffic jam ahead warning.