A controller is required for a traffic light at a four-way intersection. The lights follow the usual UK red, red–amber, green, amber sequence. The lights facing North and South are always identical, as are the lights facing East and West. There are four detectors which indicate if there is traffic approaching the lights from any direction. 

Describe all inputs and outputs of the control circuit

Answer rating: 100% (QA)

Inputs 1 Detector for Northbound traffic Indicates if there is traffic approaching from the North di... View the full answer