wrote:

Almost all the promoting videos show collisions when running red lights, It isn't clear to me how this will stop those accidents.

Skeptic

UH

I read how this works in an industry electronics mag. The GPS knows you are approaching a traffic light and the device checks the (smart) traffic light status (via a radio link). It knows you have a green light. Next it scans the signals from all cars in the area. They should be stopped or slowing if they have a red light. If they are not, your brakes are applied as you approach the intersection and the device alerts you that someone is "running the light"!