Can there ever be green signals at the same time for two conflicting traffic movements?
No. It is not possible for two conflicting approaches to be green at the same time. in the event that this was detected, the signals would automatically switch off within 500 milliseconds. This is a requirement of the regulations applying to traffic signals in the UK. This is the same if a pedestrian phase and a conflicting traffic phase were to get green at the same time. All the equipment is thoroughly tested and checked to ensure that green conflicts don’t occur.
