1840 | International Journal of Current Engineering and Technology, Vol.4, No.3 (June 2014) Research Article International Journal of Current Engineering and Technology E-ISSN 2277 – 4106, P-ISSN 2347 - 5161 ©2014 INPRESSCO ® , All Rights Reserved Available at http://inpressco.com/category/ijcet Traffic Congestion Control using Vehicular Ad Hoc Network Snehalata Mundhe Ȧ* and Manoj Dongre Ȧ Ȧ Department of Electronics and Telecommunication, Ramrao Adik Institute of Technology, Nerul, Navi Mumbai Accepted 19 May 2014, Available online 01 June 2014, Vol.4, No.3 (June 2014) Abstract Nowadays traffic on the roads is becoming a major problem in developed cities. With the advancement in technology vehicles themselves could be used to compile and analyze traffic data and relay it to the drivers in a format that will allow them to make smart decisions to avoid congested areas, resulting in congestion control. Vehicular Ad-Hoc network (VANET) is one of the best solution which enables vehicle to vehicle communication. Vehicular ad-hoc networks (VANET) are a form of mobile ad-hoc networks (MANET) that provide communications between nearby vehicles and nearby fixed equipment. 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. Keywords: VANET, MANET , V2V, V2I, Traffic congestion 1. Introduction 1 During the last decades, worldwide road traffic density has been increasing year after year. This case has led to the fact that, currently, motorway traffic congestions are one of the most common phenomena that motorists have to face in their trips. Apart from being a quite-stressful experience for current drivers, they also have a negative impact on the environment and the economy. In addition, the road traffic conditions affect the safety of the population since 1.2 million people worldwide are estimated to be killed each year on the roads. For this reason, nowadays the automotive industry and governments invest many resources to increase road safety and traffic efficiency, as well as to reduce the impact of transportation on the environment. One of the most promising areas of research is the study of the communications among vehicles and road-side units, or more specifically the Vehicular Ad-hoc Networks (VANETs). This kind of networks are self-configuring networks composed of a collection of vehicles and elements of roadside infrastructure connected with each other without requiring an underlying infrastructure, sending and receiving information and warnings about the current traffic situation. To achieve the efficiency in transportation with the help of vehicular communication, our approach is based on following points 1. Data packets are generated and broadcasted by affected vehicle itself which contains decision message. 2. Based on decision vehicles adapt the driving behavior and helps in controlling congestion. *Corresponding author: Snehalata Mundhe 3. Roadside infrastructure monitors the traffic and if traffic is above threshold value it broadcasts the messages. In proposed technique the data packets will be generated in case of event occurrence only. This further reduces the packet flooding problem of broadcasting as periodically data packets are not transmitted. Data packets are broadcasted to all neighbors in reception range and receiving vehicles will rebroadcast the data packet thus receiving vehicle will be responsible for forwarding the message along to the rest of the vehicles. Roadside units are continuously monitoring the traffic and if the traffic is above predetermined threshold value they will broadcast control messages, ex: Reduce the speed. The previous studies have focused on detection of traffic congestion. Mr. Fernando Terroso have proposed a cooperative approach to traffic congestion detection with complex event processing and VANET (Fernando Terroso- Sáenz,2012). Our proposed system focuses on traffic congestion control. 2. Literature Review Various researchers are working on VANET to find the solution for current crucial congestion problem. Paper by Florian Knorr aims to identify ‘critical’ road segments and to prevent a traffic jam before it actually occurs. Their work focuses on the aspects related to traffic dynamics (Florian Knorr, 2012). Elmar Schoch are proposing five distinct communication patterns that form the basis of almost all VANET applications. These patterns can serve as a base for future development. The classification also reflects that the close coupling between applications and communication in VANETs shifts the focus to a more