Federal Motor Carrier Compliance Essentials
Key federal requirements every motor carrier must meet to operate legally in interstate commerce.
USDOT Number
A USDOT number is a unique identifier assigned by FMCSA for tracking a carrier's safety record, inspections, compliance reviews, crash investigations, and audits. It is required for all commercial vehicles engaged in interstate commerce.
You can register for a USDOT number through FMCSA's Unified Registration System at no cost. Once registered, you must update your information biennially (every two years) and whenever your business details change.
Operating Authority (MC Number)
Operating authority (MC number) grants permission to operate as a for-hire carrier, broker, or freight forwarder in interstate commerce. Not all carriers need operating authority — private carriers transporting their own goods typically do not.
Types of authority include motor carrier (property or passengers), broker authority, and freight forwarder authority. The filing fee is $300 per authority type. Authority is typically granted 4 to 6 weeks after insurance is filed with FMCSA.
Insurance Requirements
FMCSA requires carriers to maintain minimum levels of financial responsibility. Your insurance company must file proof of coverage electronically with FMCSA.
| Coverage type | Form | Minimum |
|---|---|---|
| General freight | BMC-91 | $750,000 |
| Household goods | BMC-91 | $1,000,000 |
| Hazardous materials | BMC-91 | $5,000,000 |
| Cargo insurance | BMC-34 | Varies |
BOC-3 Filing
Form BOC-3 designates process agents in every state where a carrier operates. A process agent is a representative authorized to accept legal documents on behalf of the carrier. This filing is required before operating authority can be granted.
Most carriers use a blanket-coverage process agent service that covers all states for a single fee (typically $50 to $200). Individual designations are also allowed but require separate filings for each state.
UCR Registration
The Unified Carrier Registration program requires annual registration and fee payment from interstate for-hire motor carriers, brokers, freight forwarders, and leasing companies. Fees are based on the number of vehicles in the carrier's fleet.
| Fleet size | Approximate annual fee |
|---|---|
| 0–2 vehicles | $69 |
| 3–5 vehicles | $206 |
| 6–20 vehicles | $344 |
| 21–100 vehicles | $1,033 |
| 101+ vehicles | $6,882+ |
Fees are set annually by the UCR Board and may change year to year.
Drug & Alcohol Testing
FMCSA requires drug and alcohol testing for all safety-sensitive employees, including CDL drivers. Carriers must implement a testing program that includes:
- Pre-employment testing (drug test required before first duty)
- Random testing (minimum 50% of drivers for drugs, 10% for alcohol annually)
- Post-accident testing (when the driver receives a citation and there is a fatality, injury, or vehicle tow)
- Reasonable suspicion testing (when a trained supervisor observes signs of drug or alcohol use)
- Return-to-duty and follow-up testing (after a violation)
Carriers must use a USDOT-registered consortium/third-party administrator (C/TPA) or establish their own compliant program. All results must be reported to the FMCSA Drug and Alcohol Clearinghouse.
Vehicle Marking
Every CMV operating in interstate commerce must display the carrier's legal name or a single trade name, the USDOT number, and (if applicable) the MC number on both sides of the vehicle. The USDOT number must be preceded by “USDOT” and displayed in letters at least 2 inches tall. The markings must contrast with the vehicle's background color and be legible from 50 feet during daylight. Magnetic signs are acceptable as long as they are displayed whenever the vehicle is operated.
ELD Mandate
Most interstate CMV drivers who are required to keep records of duty status must use an electronic logging device (ELD) registered on the FMCSA's registered ELD list. ELDs automatically record driving time by connecting to the vehicle's engine.
Exemptions include drivers operating under the short-haul exception (no RODS requirement), drivers of vehicles manufactured before model year 2000, and drivers who use paper logs for no more than 8 days within any 30-day period.