There is only one way to stop drivers speeding and that is to stop them by controlling the maximum vehicle speed and there is only one way to ensure they wear seatbelts and that is to control the vehicle operation (e.g lose throttle) if they don't. There is one company that has won awards for it's product which does control vehicle speed by zone as well as and by lift and load. Also they use RFID tags and GPS to define speed zones not infrared which can be tampered with and doesn't always work. See www dot speedshield dot com. There are major companies using it.