Abbreviation: CMV
Commercial Motor Vehicle
A vehicle used in interstate commerce that meets one or more of the following: GVWR or GCWR of 10,001 lbs or more; designed to carry 9 or more passengers for compensation; or 15 or more passengers not for compensation; or used to transport hazardous materials requiring placards.
For CDL purposes, the thresholds are higher (26,001 lbs GVWR, 16+ passengers, or hazmat requiring placards). The broader CMV definition applies to other FMCSA regulations.
Two CMV thresholds and which rules they trigger
Two different weight thresholds matter for CMV compliance purposes. The 10,001 lb GVWR threshold triggers many FMCSA regulations: DQ file requirements, drug and alcohol testing (Part 382), and hours of service (Part 395). The 26,001 lb GVWR threshold is the CDL requirement for single vehicles. A 20,000 lb straight truck is a CMV under HOS and DQ rules but does not require a CDL. Carriers with mixed-weight fleets should confirm which regulations apply to each vehicle type.
CMV determination and hazardous materials
Even a light vehicle becomes a CMV subject to CDL and HOS requirements if it is used to transport hazardous materials in quantities requiring placards. This catches many operators by surprise — a pickup truck or cargo van carrying placarded hazmat becomes a CDL-required vehicle for that trip. Carriers occasionally handling hazmat loads should verify CDL endorsement and placard requirements before loading, regardless of the vehicle's weight.
Last updated: June 4, 2026
When this definition matters
This term usually matters when a driver, owner-operator, or small carrier is deciding whether a federal rule applies, preparing a compliance file, or checking a state CDL step. Use this definition as a starting point, then confirm the controlling requirement in the official source listed below before making a licensing, hiring, dispatch, or recordkeeping decision.
The related terms above are included because they often appear in the same compliance workflow. Reviewing them together can prevent common mix-ups, such as treating a state licensing step as a federal carrier obligation or confusing a driver record with a separate employer record.