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Increasing levels of congestion and accidents on the highway, this is due to the large number of vehicles is not proportional to the number of traffic signs and police officers. Often an accident, especially on the road crossing, it is because the number of vehicle drivers who pick up speed when the traffic light is yellow.
In this description discusses how to replace a series of traffic lights that use timer with an AC voltage, is replaced with a set of traffic lights with a microcontroller and how to combine a series of traffic lights using a microcontroller with a timer, microcontroller filled program to control the way traffic lights and timers retreat.
The result is intended for the manufacture of equipment accidents and congestion dapan reduced because it is equipped with a countdown timer, so the driver can calculate the time to stop and time for the road.