DVIR
Driver Vehicle Inspection Report.
Pre-Trip Inspection
Inspection completed before driving.
Post-Trip Inspection
Inspection completed after a trip or shift.
ABS
Anti-lock Braking System.
Brake Chamber
Air-brake component that applies brake force.
Slack Adjuster
Brake component that helps maintain adjustment.
Pushrod Travel
Brake chamber rod movement during brake application.
Air Leak
Loss of air pressure from truck systems.
Low Air Warning
Alert for unsafe air-brake pressure.
Brake Lining
Friction material used for braking.
Tire Tread Depth
Remaining usable tread on a tire.
Sidewall Damage
Damage on the side of a tire.
Hub Oil
Oil that lubricates wheel-end components.
Wheel Seal Leak
Oil leak from the wheel-end seal.
Marker Light
Light showing vehicle outline and position.
Clearance Light
Light showing vehicle width or height.
Conspicuity Tape
Reflective tape used for visibility.
Coupling
Connecting tractor and trailer.
Tug Test
Pull test to confirm trailer is locked.
Out-of-Service
Vehicle or driver cannot operate until corrected.
Roadside Inspection
DOT inspection of driver, vehicle, or cargo.
Pigtail
Electrical cord between tractor and trailer.
Glad Hands
Air-line connectors between tractor and trailer.
Landing Gear
Trailer support legs used when disconnected.
Kingpin
Trailer pin that locks into the fifth wheel.
Fifth Wheel
Tractor coupling plate for the trailer kingpin.