convoy of two big rig semi trucks with semi trailers running on the turning highway road with concrete bridge across

american big book business california cargo carrier carries carry cdl challenge chassis commercial conjunction control convoy delivering delivery destination diesel distribution driving eighteenwheeler fifth fleet freight haul haulage hauler heavyduty highway industrial inspection intersection loads log logistic logistics long lorry monitoring mountain operator owner pick protection rig rigs road safety schedule semi semitruck shipping southwest team together tractor traffic trailer trailers transit transition transport transportation transporter transporting travel truck trucking trucks visibility wheel wheels