Abstract: The invention relates to traffic control and can be used for controlling the traffic of private cars, buses, motorcycles etc, substantially in cities. The aim of said invention is to increase the reliability and the service life of a device and to simplify the structural design thereof The inventive traffic light warning system comprises at least one set consisting of a main traffic signal and at least one additional traffic signal which is placed in a traffic direction prior to the main traffic signal at a specified distance there from. Said additional traffic signal comprises at least one indicating light which is used for duplicating the indications of the corresponding indicating light of the main traffic signal. The indicating lights of the main and additional traffic signals are switched in parallel.