Abstract: Vehicular ad-hoc network (VANET) is one of the biggest components of intelligent transportation system (ITS). VANET requires routing protocols but it’s a challenging task as we have to check city environment, vehicle speed and network partitioning. VANET have many routing protocols but the most promising protocol is Position based protocol as it avoids overhead, heavy storage, delays, disruption of nodes, wasting bandwidth. Position based routing protocol are on geographical position of vehicles to select best path to exchange data. This paper discus GPSR and A-STAR routing protocol. We deal with many GPSR improved versions to get the best path by lowering the delay and tackling low delivery rate. This paper aims to improve A-STAR so that it not only facilitate urban area by predicting the motions of vehicles to improve efficiency but also by getting distance to get accuracy for data to be routed. A-STAR uses Dijktra’s algorithm, but this paper uses curvemetric algorithm to find best path.