Broadcasting Safety Information in Vehicular Networks: Issues and Approaches

Simple summary: Advanced transportation systems based on communication between cars and between cars and infrastructure are expected to improve road safety in the near future. In order to realize the future vision of traffic safety, it is necessary to have applications that are sensitive to time and safety in the in-vehicle network, and depend on reliable and efficient information broadcasting with minimal delay. Because of the large number of nodes on the network, such as peak hours, it is difficult to meet these requirements.

Individual vehicles may benefit from information obtained from other nearby vehicles, especially vehicles related to traffic jams and safety issues. Vehicle communication systems use vehicles and roadside aircraft as communication nodes within a peer-to-peer network to provide information to each other. As a collaborative approach, the vehicle communication system can make it possible to make all cooperative vehicles more efficient. According to the 2010 survey by the National Highway Traffic Safety Administration, the vehicle communication system helps to avoid up to 79% traffic accidents.

Traffic congestion occurs in the transportation network as the traffic volume increases, has a feature that the speed is slow, the travel time is long, and the waiting queue of the vehicle is long. This can cause traffic jams if traffic demand is sufficiently large and interaction between vehicles slows the traffic flow. Although congestion is the possibility of any means of transportation, this article will focus on car congestion in public roads. Extreme traffic jams begin as demand approaches the capacity (or intersection) of the road. If the vehicle stops completely for a period of time, this is often referred to as congestion or congestion. Traffic jams make drivers feel irritated and may cause roads to be violently triggered