This Intelligent Transportation System (ITS) is a tried course to lessen the congested movement issues. ITS one of the rising use of Vehicular Ad-hoc Network (VANET). VANET is a Mobile Ad-hoc Network (MANET) in which vehicles are dynamic in nature. VANET directing conventions has been considered and examined in the previous couple of years. The point of VANET is to assemble an information framework among moving vehicles on the streets, which empowers the vehicular correspondence for wellbeing concerns. This paper includes the components of VANET along with its communication architecture. The isolated Characteristics and challenges faced by VANET is discussed. In this paper, an analysis has been made to think about directing conventions on the premise of topology based and position based on the basis of Routing information availability, Topology distribution, Path selection, Periodic route updates, Route maintenance, Routing matrix and QoS parameters.