December 2015, Volume 2, Issue 12 JETIR (ISSN-2349-5162) JETIR1512009 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org 53 A Survey of Traffic Congestion Detection and Management Technique using VANET 1 Roma Patni, 2 Gayatri Jain (Pandi) 1 Student, 2 Head and PG Co-ordinator 1 2 Department of IT Engineering, 1 2 L. J. Institutes of Engineering and Technology, Gujarat Technological University Ahmedabad, Gujarat, India 1 patniroma@gmail.com, 2 gayatree.jain@gmail.com Abstract: The well-known traffic congestion problem in every environment has negative impact on many areas including economy, environment, health and lifestyle. Recently, a number of solutions based on vehicle-to-vehicle communications were proposed for traffic congestion detection and management. Vehicular Ad hoc networks (VANETs) are used to collect and aggregate real-time speed and position information on individual vehicles to optimize signal control at traffic intersections. Vehicular ad hoc network (VANET) is a promising technology to enable the communications among vehicles. We present a strategy to control traffic congestion with the help of Vehicle-to-Vehicle (V2V) and Vehicle to infrastructure (V2I) communication. This is achieved by transmission of messages which alerts the drivers about possible traffic breakdown. The message transmitted will guide the driver so as to take the decision needed to control the traffic congestion. In this paper proposed Greedy Forwarding and Event Driven Safety message to improve delivery ratio and throughputs. Keywords: VANET, Broadcast Alert message, High delivery ratio, Less Congestion I. INTRODUCTION: Vehicular Ad Hoc Networks (VANETs) [1] are self-configuring networks where the nodes are vehicles (equipped with onboard computers), elements of roadside infrastructure, sensors, and pedestrian personal devices. Wi-Fi (IEEE 802.11-based) technologies are used for deploying such kind of networks. At present, the IEEE group is completing the IEEE 802.11p and IEEE 1609 final drafts, which are known as “Standard Wireless Access in Vehicular Environments” (WAVE), specifically designed for VANETs. This technology presents the opportunity to develop powerful car systems capable of gathering, processing, and distributing information. Mobile Ad Hoc Networks or MANETs are the collection of dynamic self-configuring networks of mobile nodes. Each node will act as a host and a router that will offer connectivity to the sub-sequent node in the network. Because of the mobility feature of these networks, the communication should be able to adapt any changes in the location of the nodes or any changes that are due to the surrounding environment. It is important to find the multi-hop route between the source and the destination. Once the route is found, then each node will forward the traffic (or packets) till the target node is reached. The VANET example is shown in fig 1 [1] 1.1 Architecture of VANET Vehicular Ad hoc Networks (VANET) are the technical basis of IT’S, for which first draft standards are coming up [1]. They enable vehicles to actively communicate among each other and to better perceive the traffic situation in their vicinity, like accidents and traffic jams [1] . VANETs allow vehicles to avoid problems, either by taking any desired action or by alerting the driver. Besides the road safety enhancements that VANETs will bring, they also open doors for many applications to enhance the driving and traveling comfort like Internet access from a car. In this paper, Section II describes Literature review (includes techniques to reduce congestions). Section III in which Proposed Plan is discuss and Proposed Specified Flow Chart. Section IV in which Conclusion and Future Plan as specified.