A Framework of a V2X Communication System for Enhancing Vehicle and Pedestrian Safety at Un-Signalized Intersections

Abstract

This paper focuses on developing a framework of a vehicle-to-device (V2X) communication system for enhancing vehicle and pedestrian safety at un-signalized intersections. A comprehensive review of the literature has been made to investigate existing V2X safety applications. A cost-effective, solar-energy driven, small, and lightweight communication node device is developed to communicate with connected vehicles (CVs) via LoRa and dedicated short range communications (DSRC), and with pedestrians and unconnected vehicle through cell phones and other mobile devices via Bluetooth. A mobile application that allows pedestrians and drivers of unconnected vehicles to communicate with the communication node device and vice versa is also designed. A crash prediction algorithm is developed to identify unsafe conditions and determine appropriate CV-based safety countermeasures to be presented to system users. Finally, a CV simulation test bed is established in VISSIM to evaluate the safety benefits of the proposed methodology under various traffic and landscape conditions. The simulation results indicate that the number of conflicts increases when the penetration rate of connected devices decreases.