Design of Expressway Security Early Warning Systems Based on Internet of Vehicles

Traffic accidents occur frequently on expressways with secondary accidents following,endangering the safety of occupants of the related vehicles.Also geological disasters can often cause traffic congestion.In order to improve our expressways' intelligent information management,ensure the personnel safety of drivers and passengers,and improve the road flow rate,we designed an expressway safety early warning system consisting of vehicle-borne equipment,routing nodes and control centers,by using wireless communication and networking technology.In addition,in light of the specific environment of expressways,we designed a MAC protocol based on TDMA and a cluster based on a routing protocol to solve the problems of conflict of information chains,information interference and routing and path choice.We further set up a wireless chain network by means of the communication protocol for wireless sensor networks to ensure real-time monitoring and broadcasting of the information of the road conditions,safety hazards,traffic accident location positioning and other traffic information,and improve the intelligent management of expressways.