MODULAR DESIGN OF URBAN TRAFFIC-LIGHT SYSTEM USING PRE-EMPTIVE SCHEDULING

The existing traffic light control system is based on the fixed waiting time on each lane, which leads to waste of time and fuel. Currently the system is adapting to variable timing system, but that too with some segments of constant timing blocks and it doesn’t lead to fully flexible timing independence system. In proposed system traffic light control system with priority of time is implemented its operation; hence it will be the complete solution for modern traffic light control system. The scheduling (pre-emptive) is implemented to control and calculate the waiting time for each lane, based on the sensor module presented in lane. The implementation of four lane system with three sensors on each lane helps to provide the details for life time of task, so it leads to four independent tasks. The task which has highest deadline has the high priority and it will be processed first based on the scheduling. In LabVIEW, the sensors module can be present in each lane and it’s to be activated by traffic vehicles in the lane can be graphically represented by using LabVIEW. Keil µVisions is software that combines project management, source code editing, program debugging and complete simulation. The simulation outputs of the proposed system are implemented in the UART window6.