convoy of big rigs semi trucks with semi trailert going on the turning road with hills

american automobile big bulk business cab cargo carriage carrier carry carrying columbia commercial company connection convoy day delivering delivery direction drive driving duty eighteen fleet freight going gorge haul haulage hauler heavy highway hills industrial loads local logistic logistics long lorry moving northwest protection reliable rig rigs road running safety semi shipping tractor traffic trailer trailers transport transportation transporter transporting travel truck trucking trucks turn wheeler wheels white winding working