CONTROL SYSTEM FOR TRAFFIC SIGNAL

摘要

PROBLEM TO BE SOLVED: To shorten the time for a bus on a regular route to temporarily stop for waiting a signal by providing a sensor arranged in front of a traffic signal for detecting the bus on the regular route traveling toward the traffic signal, and performing control so as to shorten the turning-on time of 'red' signal on the basis of the velocity of the bus on the regular route calculated on the basis of this sensor signal. SOLUTION: Sensors S1-S5 for detecting bus on regular route generate sensor signals only when the bus on the regular route passes on the respective sensors. The sensors S1 and S2 are arranged at a prescribed interval L in front of a traffic signal 4a and the sensors S3-S5 are arranged in the rear of a T-shaped crossing 2. A traveling velocity V of the bus 3 on the regular route is calculated from a time difference T in the case of inputting sensor signals SS1 and SS2 from the sensors S1 and S2 to a controller 5. When this traveling velocity V is lower than a set velocity V0, slow driving caused by traffic jam is judged and the time of turn on the 'red' signal in the traffic signal 4a is shortened to a preset time.