With rapid economic development in many countries, transportation has increasingly become an extremely important component in the national economy and daily life. So it is very essential to build an intelligent traffic control and monitoring system in order to resolve the traffic congestion of roads and reduce accidents. One major factor that affects the traffic flow is the management of the traffic at road intersections in a town or city. In traditional traffic monitoring system, each intersection is controlled by its own controller which sends signals to the intersection’s traffic lights for changing their states.