day cab big rig semi truck tractor with empty low profile step down semi trailer for carry oversized loads running on the winding

american big business cargo carrier carries chassis clean columbia commercial delivering delivery destination diesel distribution down driving eighteenwheeler empty fifth fleet forest freight fuel gorge haul haulage hauler heavyduty highway industrial interstate loads logistic logistics long lorry maintain mountain moving operator owner pick protection rest rig rigs road running safety semi semitruck service shipping step tractor traffic trailer trailers transit transition transport transportation transporting travel truck trucking trucks wheel wheels white