Traffic light aid system

The utility model relates to a traffic light aid system which comprises an information processing device, a plurality of advisory speed display devices and a plurality of sensors arranged at signalized road junctions and the road sections nearby. The information of distance between the traffic light in front of a vehicle and the corresponding advisory speed display device is prearranged in the information processing device; each sensor is connected with a traffic light control network, collects the traffic flow information at the corresponding signalized road junction and sends the information to the information processing device through the traffic light control network; the information processing device calculates the speed range for the vehicle to pass through the signalized road junction in the front according to the status of the traffic light in front of the vehicle sent by the traffic light control network and the time change rule of the traffic light, selects a speed range more suitable for the practical condition in consideration to the corresponding traffic flow information collected by the sensor, and sends the speed range to the corresponding advisory speed display device to be displayed. The traffic light aid system can accurately provide advisory speed to the drivers, improves the vehicle passing efficiency, and reduces exhaust emission of the vehicles. Therefore, the traffic light aid system is widely applicable in traffic management systems.