Abstarct: In recent decades the increasing problems caused by urban and road transport and traffic have forced researchers to conduct extensive research activities to improve “ intelligent transportation system ” performance. Some of these problems are network deformation, interference, lack of bandwidth and shortness of communication range. These problems necessitate an efficient routing protocol. In this thesis a new method for predicting the next location of users in vanets is presented. baxsed on it and in order to improve the performance of the HSDR routing protocol, changes were made and a new routing porotocol was introduced. In the new protocol time was assigned to directional antenna beam adjustment timer baxsed on the probability of successful two_way communication between the two nodes. Also in this protocol the timers were calculated periodically and for periods for which we don’t have these calculations, a combination of a method of forecasting and allocation as weight ratio was used to assign time to the timers. Then after rotation of antenna beams according to the explained pattern and gather information about neighboring nodes in information table, by using an algorithm and baxsed on waiting and translating times for neighbor nodes, the best path of data packet transmission was determined. In the end, the simulation results improved the performance of the proposed routing protocol compared to the HSDR algorithm.