Need a DOT inspection near you in Maine?
If your vehicle is registered in another state, Bright Inspect does the federal annual where your truck is parked. Maine-registered commercial vehicles need the state inspection at a licensed station, and we tell you which applies before you pay.
| Item | Maine |
|---|---|
| Lead agency | Maine State Police, Troop K Commercial Vehicle Unit |
| Federal rules | Broadly adopted for intrastate carriers |
| Who's covered intrastate | 10,001 lb or more; federal passenger triggers; placarded hazmat |
| Annual inspection | Every 12 months |
| State program | Commercial inspection at licensed stations by a Maine-licensed inspection technician, FMCSA-accepted |
| Proof | Inspection report or Maine inspection sticker |
Compare Maine with other states on the state requirements hub, or see which states run their own inspection programs.
The Maine State Police, through Troop K's Commercial Vehicle Unit, enforces motor carrier safety under 29-A M.R.S. 555. The State Police Motor Vehicle Inspection Unit licenses inspection stations and technicians, and the Bureau of Motor Vehicles publishes commercial vehicle safety inspection guidance.
Yes. Maine adopts the federal motor carrier safety rules through its Motor Carrier Safety Regulation (16-222 C.M.R. ch. 4). Coverage starts at 10,001 lb, with the federal passenger triggers and placarded hazmat at any weight.
| Operation | Who's covered |
|---|---|
| Interstate | 10,001 lb or more, plus federal passenger and hazmat triggers (49 CFR 390.5) |
| Intrastate (Maine only) | 10,001 lb or more; more than 8 passengers including the driver for compensation, or more than 15 not for compensation; placarded hazmat |
Maine requires an annual inspection for commercial motor vehicles that must be registered in Maine and weigh over 10,000 lb, and for trailers over 7,000 lb, in interstate or intrastate commerce (29-A M.R.S. 1753). The State Police inspection rules must meet 49 CFR 396.17, and FMCSA accepts the program in place of the federal annual. Exemptions include certain light intrastate trailers, some reel trailers and pole dollies, transit-plated units, some farm and fish trucks, camp trailers, and qualifying trailers inspected out of state.
| Inspection | Applies to | How often | Rule |
|---|---|---|---|
| Maine commercial inspection (Class D) | Maine-registered commercial vehicles over 10,000 lb; trailers over 7,000 lb; each unit in a combination | 12 months, at a licensed station | 29-A M.R.S. 1753; 49 CFR 396.23 |
| Federal annual | Covered vehicles registered outside Maine | 12 months | 49 CFR 396.17 |
| School bus inspection (Class B) | School buses | Twice a year at a designated school bus station, plus a State Police inspection at least annually | 29-A M.R.S. 2307 |
Every unit counts on its own: see whether each trailer needs its own annual inspection.
Maine runs an FMCSA-accepted state program, so vehicles it covers must use it. Only a Maine-licensed inspection technician at an authorized commercial (Class D) inspection station can perform and certify a Maine inspection, and a technology-based inspection does not replace it. Our federal annual is not a substitute for the Maine inspection.
Bright Inspect's federal annual, designed to meet FMCSA annual inspection requirements, may fit vehicles registered in other states that run in Maine. Which vehicles fall outside the Maine program is still being confirmed, so we check your registration and vehicle before you pay.
Maine lets you show proof with either a qualifying inspection report or a Maine inspection sticker; if you rely on the report, it must be produced on demand. Carriers keep the inspection report 14 months and maintenance records under Part 396. The Maine inspection fee is based on the station's posted hourly labor rate and is due whether or not the vehicle passes.
| Vehicle | Rule |
|---|---|
| Tow trucks | We're still confirming Maine tow truck rules. Check with the Maine State Police Commercial Vehicle Unit directly. |
| School buses | Class B inspection twice a year by a certified technician at a designated school bus station, covering the full commercial inspection plus school bus items; the sticker lasts up to 6 months, and a copy of the report stays in the bus |
| Passenger carriers | Buses are covered by the Maine commercial inspection; carriers also keep bus emergency exit test records |
Maine State Police troopers and trained civilian motor carrier inspectors conduct roadside inspections at fixed facilities, temporary sites and on patrol. Federal rules let an officer cite you under 49 CFR 396.17(c) when proof of a current annual inspection isn't on the vehicle; it carries a CSA severity weight of 4. The officer gives the driver an inspection report. The carrier must certify that listed violations were corrected and return it within 15 days, and keep a copy for 12 months (49 CFR 396.9). Fines are set by state law. A roadside inspection isn't the same as your Maine annual and doesn't replace it.
We're still confirming roadside fines for a missing annual inspection in Maine. Check with the Maine State Police Commercial Vehicle Unit directly.
Stopped without proof of a current annual? See what to do when your inspection expired or failed at roadside and what happens if your annual inspection is expired. Nobody can promise to remove a violation or change a safety score; what fixes the problem going forward is a current inspection and a complete record.
Last reviewed: September 11, 2026