Sharing vehicle and infrastructure intelligence for assisted intersection safety

In this paper, we describe a framework and system architecture for sharing of information between vehicles and infrastructure with the aim of increasing intersection safety. Emerging intersection safety applications are based on location sensing and wireless communication. We show that these applications can only be realized if vehicles and intersection can both participate and share their information and intelligence. The framework to share information is based on wireless communications, usually in DSRC mode. We first present a system architecture that uses a networking gateway in order to allow incorporation of wireless communication modes other than DSRC. Then the overhead of this extra component is examined via experiments and shown not to have a significant effect on the performance of the system. Experimental results from the implementation of the proposed architecture is reported and analyzed. For system scalability we also conducted simulations to examine different design choices for the rate of information exchange and operation of the components of the architecture. The results show that even modest cooperation of vehicle and infrastructure can be adequate to enable safety critical applications.