Abstract: In this paper we present optimization technique for efficient routing for VANET. VANET plays an important role in dissemination of traffic and necessity knowledge among vehicles moving on roads. This information is used by various vehicular applications like road safety applications, route enlightenment applications etc. The survey of routing protocols in VANET is meaningful and crucial for smart ITS. This paper explain the applications of various routing protocols for vehicular ad hoc networks. This paper consult with the main five types of protocols for VANET Topology Based, Positioned Based, Geo Cast, Broad Cast, and Cluster Based Protocols and mainly three types of optimization techniques i.e. Ant colony optimization, Particle Swarm Optimization and Honey Bee optimization.

Keywords: VANET, ITS, CBLR, RSU, OBU