A pre-trip inspection is the check a commercial motor vehicle driver performs before driving to confirm the vehicle is in safe operating condition. The driver walks around and through the vehicle, checking brakes, steering, lights, tires, wheels, coupling devices, mirrors, wipers, emergency equipment and cargo securement, and reviews the last driver vehicle inspection report for defects and repairs.
Pre-trip inspections matter because many roadside violations, including brake, tire and lighting defects, could have been found before the truck left the yard. Catching defects early prevents breakdowns and crashes, avoids out-of-service orders, and protects a carrier's Vehicle Maintenance BASIC in FMCSA's Safety Measurement System.
What Do the Regulations Require?
49 CFR 392.7: Equipment inspection and use
Under 49 CFR 392.7(a), a driver may not drive a CMV unless the driver is satisfied that these parts and accessories are in good working order:
- Service brakes, including trailer brake connections
- Parking brake
- Steering mechanism
- Lighting devices and reflectors
- Tires
- Horn
- Windshield wipers
- Rear-vision mirrors
- Coupling devices
- Wheels and rims
- Emergency equipment
Section 392.7(b) adds inspection items for drivers picking up intermodal equipment, such as chassis.
49 CFR 396.13: Driver inspection
Before driving, the driver must be satisfied that the vehicle is in safe operating condition. The driver must also review the last driver vehicle inspection report (DVIR) and, if defects were noted and the carrier certified that they were repaired or that repair was unnecessary, sign the report to acknowledge the review.
Cargo securement
Under 49 CFR 392.9, the driver must also confirm that cargo and securement devices are properly distributed and secured before driving, and recheck them within the first 50 miles and at set intervals afterward. See cargo securement for details.
Pre-Trip Inspection vs. DVIR
The pre-trip inspection and the post-trip DVIR are related but different.
- Pre-trip inspection: done before driving. The regulations do not require a written pre-trip report, but the driver must be satisfied the vehicle is safe and must review and sign the previous DVIR when defects were listed and repairs certified.
- Post-trip DVIR: under 49 CFR 396.11, drivers of property-carrying CMVs must prepare a written report at the end of each day only when a defect or deficiency is found or reported. Drivers of passenger-carrying CMVs must prepare a report at the end of each day whether or not defects are found.
Many carriers require a written or electronic pre-trip record anyway, because it shows that inspections are happening and gives drivers a consistent checklist. The CDL skills test also includes a full pre-trip inspection, so drivers are trained on it from the start.
A CMV Pre-Trip Inspection Checklist
- Engine compartment: fluid levels, leaks, belts, hoses and wiring.
- Cab: gauges, air pressure build-up and warning devices, horn, wipers, mirrors, seat belt, and emergency equipment such as fire extinguisher and warning triangles.
- Brakes: air leaks, low-air warning, parking brake hold, slack adjusters, brake chambers, hoses and linings where visible.
- Steering and suspension: steering play, linkages, springs, mounts and shock absorbers.
- Lights and reflectors: headlights, turn signals, brake lights, clearance and marker lamps, and reflective tape.
- Tires and wheels: tread depth, inflation, cuts, bulges, mismatched duals, loose or missing lug nuts and cracked rims.
- Coupling: fifth wheel locking jaws, kingpin, mounting, glad hands, electrical lines, safety chains and landing gear.
- Cargo and doors: load securement, doors, tarps and any required hazmat placards.
Tailor the checklist to your vehicle types, such as buses, tankers or straight trucks with liftgates.
Why Pre-Trip Inspections Affect Roadside Results
Roadside inspectors check many of the same items a driver covers in a pre-trip, using the CVSA North American Standard Out-of-Service Criteria. Brake adjustment, air leaks, tire condition and inoperative lamps are among the most frequently cited vehicle violations, and serious defects can place the vehicle out of service on the spot. Every vehicle violation found at roadside counts in the Vehicle Maintenance BASIC for 24 months, while a clean inspection helps lower it. A consistent pre-trip routine is one of the simplest ways for a fleet to reduce both breakdowns and roadside violations.
How to Perform a Pre-Trip Inspection Step by Step
- Review the last DVIR. Check for listed defects and confirm repairs were certified, then sign it if required.
- Approach the vehicle. Look for leaks, leaning, damage and obstructions around the vehicle.
- Check the engine compartment. Inspect fluids, belts, hoses and wiring with the engine off.
- Start the engine and check the cab. Confirm gauges, air pressure, warning lights, horn, wipers, mirrors and emergency equipment.
- Test the brakes. Perform air brake checks, such as leak-down and low-air warning tests, and confirm the parking brake holds.
- Walk around the vehicle. Inspect lights, tires, wheels, suspension, coupling devices and cargo securement on every side.
- Record and report defects. Do not drive with a defect that affects safe operation. Report it so it can be repaired.
Common Mistakes to Avoid
- Signing off on an inspection without actually walking around the vehicle.
- Skipping the review of the previous DVIR.
- Not checking brake adjustment and air system leaks, which are leading causes of roadside OOS orders.
- Rushing the inspection because of delivery pressure.
- Treating the inspection as a formality and not reporting small defects before they grow.
How SMS360 Helps
SMS360's Vehicle Management module keeps each vehicle's inspection and maintenance records together, so reported defects can be tracked to repair. Audits & Inspections lets drivers complete pre-trip checklists on mobile devices, and Actions Management turns failed items into assigned repair actions. For brake-specific checks, see brake inspection.
Frequently Asked Questions
Is a written pre-trip inspection required by FMCSA?
No. 49 CFR 392.7 and 49 CFR 396.13 require the inspection and the DVIR review, but not a written pre-trip report. Many carriers require one as a best practice and to document compliance.
How long should a pre-trip inspection take?
FMCSA does not set a time. A thorough inspection of a tractor-trailer often takes 15 minutes or more, and drivers should log it as on-duty not driving time on their record of duty status.
What happens if a driver finds a defect during a pre-trip?
The driver should not operate the vehicle if the defect affects safe operation. The defect should be reported, repaired and documented before the vehicle is used.
