oversize load sign on the back of big rig semi truck tractor on

american area attention automotive back big cargo carrier class commercial dangerous delivering delivery direction drive driving duty eighteen equipment fleet freight going haul heavy industrial instruction land launch load loaded loads logistic logistics lorry lot movement moves moving outdoors oversize parking ready regulation regulations reposition rest rig rigs rotate safe safety semi shipping side sign special tractor traffic trailer trailers transit transport transportation transporter transporting travel truck trucking trucks used vehicle wheeler work yellow