A traffic light controller (20, Figure 1) for controlling multiple traffic light units has multiple operating modes, each corresponding to a particular sequencing or timing arrangement (e.g. a fixed timing sequence mode, a manual mode and a vehicle-activated mode). The controller can accept demands (i.e. requests for a traffic light to adopt a particular state) and service them according to the operating mode. It can save in memory any un-serviced demands preceding a mode change and prioritise them following the mode change. This can reduce the waiting time for a vehicle following the mode change. The demands may be manual (i.e. from the controller), natural (i.e. from a vehicle sensor) or forced or nudge demands from an internal timer. The controller may receive a demand, add it to a demand queue in a priority-based position, service the demands according to their priorities, remove serviced demands from the queue and maintain the demand queue across mode switches.
Traffic Signal Controller System
29.05.2024
Patent
Elektronische Ressource
Englisch
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |