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Federal Motor Carrier Safety Administration (FMCSA) (Customs Glossary)

Last updated 20 July 2026

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This article is part of the Customs Glossary Guide
The FMCSA logo
The FMCSA logo

The Federal Motor Carrier Safety Administration (FMCSA) is an agency within the United States Department of Transportation (USDOT). Its primary mission is to reduce crashes, injuries, and fatalities involving large trucks and buses.[1]

FMCSA regulates commercial motor vehicle safety in the United States. For highway carriers, FMCSA rules and systems may affect carrier registration, USDOT numbers, operating authority, driver qualifications, hours of service, vehicle maintenance, drug and alcohol requirements, safety ratings, roadside inspections, and enforcement.

Why FMCSA Matters

Canadian, Mexican, and U.S. carriers operating commercial motor vehicles in the United States must comply with applicable FMCSA requirements. This is especially important for cross-border carriers because customs compliance and motor carrier safety compliance are separate obligations.

A carrier may have a valid ACE Manifest or customs release and still have a separate FMCSA issue involving its USDOT number, operating authority, driver qualification, insurance, or safety record. Carriers should confirm both customs and FMCSA readiness before dispatching trucks into the United States.

USDOT Number

A USDOT number identifies a motor carrier in FMCSA systems and is used to track safety information, inspections, crashes, and compliance history. FMCSA states that companies subject to federal motor carrier safety requirements are required to obtain a USDOT number.[2]

Canadian carriers operating commercial motor vehicles in the United States should confirm whether they need a USDOT number and whether their registration information is current. BorderConnect's customs compliance guide notes that many commercial vehicles over 10,001 lbs operating in interstate or international commerce require a USDOT number to conduct business in the United States.[3]

Operating Authority

Some for-hire carriers also need FMCSA operating authority, often called a Motor Carrier Number or MC number. FMCSA states that companies generally need interstate operating authority in addition to a USDOT number if they transport passengers in interstate commerce for compensation or transport federally regulated commodities owned by others for compensation in interstate commerce.[4]

FMCSA operating authority may be identified as an MC, FF, or MX number depending on the type of authority granted.[4] Not every carrier with a USDOT number needs operating authority, so carriers should confirm their requirements based on their operation, cargo, and business model.

Driver Licensing

FMCSA recognizes only certain foreign commercial driver licences for operation in the United States. FMCSA states that the only foreign commercial driver licences accepted in the United States are licences issued by Canadian provinces or territories and by the federal government of Mexico.[5]

Canadian commercial drivers do not need to obtain a U.S. commercial driver's license solely because they are operating in the United States with a valid Canadian provincial or territorial licence. Mexican commercial drivers operating in the United States must hold a valid Licencia Federal de Conductor rather than a Mexican state-issued licence for U.S. cross-border commercial operations.[5]

Safety Compliance

FMCSA monitors and enforces compliance with U.S. motor carrier safety rules. Its regulations may affect hours of service, driver qualification files, roadside inspections, vehicle inspection and maintenance, hazardous materials safety, insurance, drug and alcohol testing, and enforcement actions.

FMCSA's regulations and interpretations cover 49 CFR Parts 300-399 and are available through FMCSA's regulations portal.[6] Cross-border carriers should understand that these safety rules operate separately from CBP customs reporting requirements.

FMCSA and BorderConnect

FMCSA information is not the same as customs release information, but it is still important for cross-border highway carriers using BorderConnect. BorderConnect is used for ACE Manifest and ACI eManifest workflows, while FMCSA is responsible for U.S. commercial motor vehicle safety registration and compliance.

In BorderConnect, FMCSA-related information may be relevant when maintaining company, carrier, truck, trailer, and driver profiles. Accurate profile data helps users prepare ACE eManifests more efficiently and reduces the chance of avoidable mistakes in carrier or driver information.

BorderConnect's ACE Manifest tools are customs filing tools, not FMCSA registration tools. A carrier should confirm its USDOT number, operating authority, driver qualification, and safety compliance directly through FMCSA or qualified compliance resources before operating in the United States.

BorderConnect Usage

BorderConnect users may encounter FMCSA-related data when setting up a U.S.-bound cross-border operation or maintaining internal carrier records. This may include the carrier's USDOT number, MC number, legal company name, driver licence information, truck and trailer details, and other records used by dispatch or compliance teams.

BorderConnect's platform allows carriers to create and submit ACE Manifests to CBP, while FMCSA compliance remains a separate responsibility of the motor carrier.[7] For example, an ACE Manifest may be correctly filed with CBP, but the carrier must still ensure it has the required USDOT registration and operating authority, if applicable.

When onboarding a new carrier, dispatching a new truck, or adding a driver, companies should verify that the operational and safety records are accurate before relying on those profiles for U.S.-bound trips. Keeping these records current supports both customs filing accuracy and internal compliance controls.

System or Program Description
SAFER The Safety and Fitness Electronic Records system provides carrier snapshots and safety-related company information.
SMS / CSA The Safety Measurement System is part of FMCSA's Compliance, Safety, Accountability program and uses inspection, violation, and crash data to help identify carriers for intervention.
Drug and Alcohol Clearinghouse The FMCSA Clearinghouse is used for drug and alcohol program compliance for CDL and commercial learner's permit drivers subject to federal testing rules.
Unified Registration System FMCSA's registration tools are used for registration, updates, USDOT number applications, and operating authority-related filings.

FMCSA's Getting Started with Registration page lists registration steps such as determining whether the company needs a USDOT number, operating authority, insurance filings, state registration, new entrant safety requirements, and ongoing updates.[2]

Best Practices

  • Confirm whether the carrier needs a USDOT number before operating in the United States.
  • Confirm whether the operation requires MC operating authority.
  • Keep FMCSA registration and company information current.
  • Verify driver licence information before dispatching U.S.-bound trips.
  • Maintain truck, trailer, and driver profiles accurately in BorderConnect.
  • Do not treat ACE Manifest acceptance as proof of FMCSA compliance.
  • Use FMCSA official systems to confirm safety registration and authority status.

Official Resources

References

  1. ↑ FMCSA: Our Mission
  2. ↑ 2.0 2.1 FMCSA: Getting Started with Registration
  3. ↑ BorderConnect Wiki: What Is A USDOT And A Motor Carrier (MC) Number
  4. ↑ 4.0 4.1 FMCSA: Get Operating Authority
  5. ↑ 5.0 5.1 FMCSA: Commercial and non-Commercial Driver License Requirements
  6. ↑ FMCSA: Regulations and Interpretations
  7. ↑ BorderConnect: ACE and ACI eManifest Portal
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