An Intersection Collision Warning System Using Wi-Fi Smartphones in VANET

Intersection collision warning system has been widely studied with the progress in wireless communication technology and positioning devices, which are now increasingly available on smart phones. In this paper, we present an Intersection Collision Warning (ICW) system using Wi-Fi smart phones with built-in GPS receivers for vehicular ad-hoc networks. In the system, smart phones first retrieve safety-related information, i.e., location, moving direction and velocity, via onboard GPS receivers and then periodically exchange the information using standard wireless communication between vehicles to compute the probability of potential collision and issue warnings when necessary. Simulation results show that our ICW system can significantly reduce the probability of collisions.