In order to improve efficiency of data transmission and routing discovery in VANET

zone routing protocol is improved. Considering the diversity of VANET communication environment

including road layout

moving direction

location

etc

restricted flooding mechanism is to reduce the flooding area by judging the position relationship between nodes

to further reduce the forwarding node number

the next hop select the nodes that has the same movement direction with source node. In order to adapt to frequent changes in the VANET

the destination node select preferentially the link that has the maximum of average number of neighbor nodes and number of nodes in the same direction of movement. Simulation results show that the improved protocol overcome some downside of original protocol

such as the large overhead caused by omnidirectional flooding

high packet loss rate and high retransmission rate caused by the way of simple routing selection etc

and the improved ZRP scheme is proved better adapt to vehicles communication in VANET.