There is a road where there are LED traffic lights, intersection traffic light signal control can not be separated from the traffic signal controller
Any adaptive traffic control system relies upon good detection of the current conditions in real-time to allow a quick and effective response to any changes in the current traffic situation.
Traffic Signal Controller vehicles at the start of each approach to every controlled intersection. It models the progression of the traffic from the detector through the stopline, taking due account of the state of the LED traffic signals and any consequent queues.
The information from the model is used to optimise the signals to minimise the network delay.