Traffic control system means of traffic signals operated on a time basis constitutes an open loop control system. The sequence of control signals are based on a time slot given for each signal. The time slots are decided based on a traffic study. The system will not measure the density of the traffic before giving the signals. In closed loop system the traffic control system can be made by the time slots of the signal are decided based on the density of traffic. The density of the traffic is measured on all the sides and the information is fed to a computer.