Abstract: Vehicular ad-hoc networks (VANETs) are the class of mobile ad-hoc network (MANET) applications that have the future chances in improving road safety and in giving travellers contentment. Now a day’s many persons are adopting cars and other individual vehicles. The biggest hazard respect to increased use of private transport is the increasing number of victims of the accidents on the roads; the expense and associated dangers have been predictable as a serious problem being confronted by current society. In this paper we are going to consider the main features related to VANETs its characteristics and functions. This field is favourable for researchers and developers to percept and differentiate the main aspects neighbouring VANETs.

Keywords: Vehicular Ad hoc Network, RSU, OBU global position system (GPS), attacks.