Around the world we can found some WSN approaches to overcome this problem In presents a novel system based on wireless sensors network that has the potential to revolutionize traffic surveillance technology because of its low cost and potential for large scale deployment. The system consists of two parts: a wireless sensor network and an access point. The wireless sensor network consists of a group of nodes, each comprising one or more sensors, a processor, a radio and a battery. They generate traffic information such as number of cars, speed and length of the vehicles, based on processing of the sensor data. The information is then sent to the access point over the radio. The traffic management center collects the information from each access point to analyze traffic conditions and take actions such as adjusting the traffic light durations. An example configuration for the system is given in Figure for an urban intersection and a freeway.
This effort is to develop a traffic monitoring system that aims to control the traffic congestions and improve the transport service. Since this system is based on wireless sensor network and it is more applicable to country like Sri Lanka because of low cost and large scale deployment. To be applicable for traffic monitoring this system must confirm the accuracy, lifetime of system. To fulfill these requirements sensor node, vehicle detection algorithm and the protocol used must be well designed.
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