This paper proposes an improved GRPS protocol based on the ant colony algorithm, OVGPSR. In this protocol, various factors are considered in the routing calculation, and the parameters such as vehicle speed, energy consumption, and deflection angle are introduced into the ant colony algorithm. The algorithm predicts vehicle intermediate nodes, improves the ability of a vehicle ad hoc network, and reduces energy consumption. The results show that OVGPSR decreases delay and enhance throughput.