Advance in mobile ad hoc network and information technology for safety purpose of vehicles movement vehicle ad hoc network introduce, this network rapidly change network scenario and security concern is one of the most concerning area for this network, in our paper we study about vehicle ad hoc intrusion and it's prevention our propose work focus on trust between vehicles which is built on the basis of road side unit or vehicle reply and there truth probability on the basis of trust vehicles communicate to each other. © 2016 IEEE.