To provide a duplicate traffic signal controller switching to a standby control system quickly and continuously controlling traffic signals when an abnormal state of a traffic light is detected.
The traffic signal controller 100 is provided with a primary traffic signal controller for controlling a signal and a standby traffic signal controller with the same structure as the primary traffic signal controller to be used when the primary traffic signal controller fails. The primary traffic signal controller has: a phase data storage part for storing phase data; a control unit for controlling lighting of the signal; a lamp control unit for lighting each lamp of the signal; an abnormal state storage part for storing combinations of abnormal lighting state of the signal; and a failure detection part for giving an instruction to use the standby traffic signal controller when the lighting state is determined to be abnormal.
| JPH09180090 | RECOGNIZING METHOD FOR SIGN |
| JP7143812 | vehicle |
| WO/2021/112277 | SYSTEM FOR MANAGING SAFETY OF PEDESTRIAN AT CROSSWALK |
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu