Assessing the feasibility of a VANET driver warning system

In this work we evaluate the feasibility of a VANET Warning System in which damaged vehicles send vehicle safety messages with high reliability and low delay. We performed a sensitivity study to evaluate the impact of varying some parameters in the proposed system. We varied the number of damaged vehicles, the total number of vehicles, as well as the priority and periodicity of the messages sent to study the impact on the time required to propagate the warning messages, the number of blind vehicles (i.e., vehicles that do not receive these packets) and the number of packets received per vehicle, in order to study the viability of our system. We show that the warning notification time is lower when vehicle density increases and the percentage of blind vehicles highly depends on this factor. Finally, the results demonstrated that, to obtain the lowest possible warning notification time in our system, the best solution is that messages have different priorities depending on their characteristics.