refrigeration units on truck semi trailers stand in a row on warehouse parking lot

american automobile big business cargo carriage carrier carry carrying commercial company connection conveyance cool delivering delivery direction drive driving duty eighteen fleet freight going haul haulage hauler heavy industrial loads local logistic logistics long lorry lot moving parking powerful protection reefer refrigerated refrigerator reliable rig rigs road safety schedule semi shipping stop tractor traffic trailer trailers transport transportation transporter transporting travel truck trucking trucks unit wheeler working