For beating the red light...video. Go to Traffic department and have them review the video. If you let the ambulance to pass thru, it should show you pulling over to let the ambulance pass. If you go straight, then it's hard to justify. A simple tip for QLers...don't move to close to the white line when it's red. At least if there's an emergency, you still have enough room to move your vehicle and not trigger the camera. the sensor (loop detector) is right after the thick line. You'll see the tar marking on the road. It's a magnetic sensor that detects the presence of any vehicle. If a vehicle is sensed, then it's armed. If you move your vehicle to the point that the detector can't sense it, then it'll fire up the camera.