Traffic control signal lamp system by circular red, yellow, green trichromatic lamp number and arrow pattern, to time change, assign different direction traffic travel of the right of way; or by containing only red, green circular lamp, to the one-way wheel traffic control. Generally located in the intersection or the implementation of one-way round on the road. According to the way of operation:

Signal timing traffic induction signal lamp adjust traffic signal lights pedestrian signal lamp system with traffic control signals used to attach "standing pedestrians" and "walking pedestrians" pattern of square red, green and white light, and control for pedestrians to cross the street whereabouts, located in the middle of the fork in the road or the road. According to the way of operation:

Pedestrians in timing signal light touch signal lamp special traffic lights, including: lane control signal lamp system with fork and arrow pattern of a square red, green and white light, and assigned lane of the right to use, located in the path of the middle or toll station. Multitemporal four intersection signal that lights (set in T-shaped and Y-shaped intersection and prohibited from turning left, prohibition of right turn, forbidden to enter the intersection, will limit the vehicle left turn time). Multitemporal five junctions lights that lights (set at the crossroads of three lanes to four lanes, with red, yellow, and turn left the green arrow, green arrow and the right of the green arrow forward etc. five lights, to control the moving vehicles and stop. In addition the signal lamp fixed left time set for the red light left arrow head to allow vehicles turning left traffic). Railway level crossing signal lamp system with parallel double circular flash a red signal, the prohibition of pedestrian and vehicle crossing the railway level crossing, arranged in the railway crossing. Pedestrian crossing signal lamp system parallel to the circular double flash yellow light, to warn of approaching vehicles should be slow down, such as a pedestrian crossing shall suspend let pedestrians cross the street, located in zebra pedestrian crosswalk markings in front. Special flashing signal lamp system with single specular flash red or yellow lights, warning approaching the vehicle to pay attention to the road ahead should pause or slow down, and as the road to determine the whereabouts is arranged on the fork in the road or dangerous section of the road. Blind audio signal lights to pedestrian signal lamp or pedestrian crossing signal lamp with the way for the establishment of sound source is fixed, the audio inform blindmen can blind by the prevailing direction and warn the driver of the vehicle. As required in the blind trip concentrated near the site of intersections or sections. Ramp metering signal lamp through a series of circular red, yellow and green three color lights, or red and green two color lights change, control of vehicle on the ramp presupposition, to limit is reached vehicles entering the freeway mainline, arranged on the entrance ramp and acceleration lane connecting position. The operation mode can be a timing signal lamp or traffic signal lamp.