Fire Police functions at an incident scene can have a wide array of functions such as road closures, traffic control, crowd control at public events, security, and other miscellaneous tasks as requested. Most of the equipment they are required to carry are large and cumbersome. Vehicles may need to be equipped with utility bodies, truck caps, truck inserts, slide-out trays, light towers, lift up arrow boards, lift up message boards, truck mounted attenuators and more.