Routing protocol for traffic flow statistics is proposed to adapt for traffic management.Because of limited energy of wireless sensor networks and requirement of practical application

effective time of the vehicles in the detection region is added in the routing table in order to dynamicly control whether the middle node retransmits the message and to avoid the base station receiving useless information and the energy consumption of node is reduced.A wake-up strategy of nodes is proposed to improve the quality of the target tracking for traffic flow statistic.The simulation results show that the protocol prolongs the network lifetime compared with AODV and TSR protocols.