Sadly, most signal controllers are still using firmware that is not trajectory aware, so rather than reporting the speed and distance of an oncoming vehicle, th

Sadly, most signal controllers are still using firmware that is not trajectory aware, so rather than reporting the speed and distance of an oncoming vehicle, these vision systems just emulate a magnetic loop by flipping a 0 to a 1 to indicate mere presence rather than passing along the richer data that they have.