The new over-height and length warning system makes use of two Lidar units to measure height and length of west-bound vehicles. Once a vehicle is found to fall into the set parameters, the system sends a signal to the signalised pedestrian crossing which then turns red to stop the vehicle that has exceeded the parameters. In addition, three in-ground red stop lane lights are activated and a Variable Message Sign (VMS) flashes a warning to the driver of the vehicle. The system will hold these conditions until the target vehicle leaves the detection zone to provide the driver enough time to turn around and take an alternative route.