Flashing amber lights are used on construction vehicles, towing vehicles, tow cars that are attending, snow-removal equipment, sanding equipment, pilot cars, and vehicles that are required by permit to use them, such as some oversize vehicles or vehicles carrying oversize loads. If a vehicle is going to haul an oversize load, the driver must obtain a Commercial Vehicle Safety & Enforcement permit from ICBC. This will allow the driver to mount flashing amber or red lights on the vehicle as well as the appropriate oversize signs.