Definition
Two federal rules shape the pre-trip inspection. 49 CFR 392.7(a) says no commercial motor vehicle shall be driven 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, and emergency equipment. Drivers preparing to move intermodal equipment have a parallel list in 392.7(b).
49 CFR 396.13 then sets three duties before driving: be satisfied the vehicle is in safe operating condition, review the last driver vehicle inspection report if one was required under 396.11, and sign that report to acknowledge the review and that required repairs were certified. The signature is not required for defects on a towed unit that is no longer part of the combination.
Pre-trip versus DVIR
The pre-trip is the driver's check before the day starts. The DVIR is the written report prepared at the end of the day when a defect is found or reported. The two close a loop: a defect written up at night is repaired and certified, and the next driver reviews that certification at the pre-trip.
For repair shops
Defects found at the pre-trip often become same-day road calls, so mobile shops tend to see them first. When you certify a DVIR repair, get the signed certification back to the fleet the same day, in its DVIR system or with the truck, and name the defect and the correction so the driver's review is quick. MetaFleet supports digital inspections built from your own form; see inspections and DVIRs. See also post-trip inspection and DVIR.