I can't speak to this design specifically, but in the US, an app like this should _request_ a time slot for crossing, which would get processed by the timing co

I can't speak to this design specifically, but in the US, an app like this should _request_ a time slot for crossing, which would get processed by the timing controller. An attacker could use long range bluetooth antennas to pair at a distance, and request for the next 3 intersections, the high tech equivalent of pushing all the buttons in the elevator.