What Is FMCSA? Federal Motor Carrier Safety Administration

FMCSA’s mission centers on large-truck and bus safety. It administers applicable federal motor-carrier requirements. Which requirements apply depends on the operation, vehicle, passengers or cargo and jurisdiction; “every business with a truck follows every FMCSA rule” is too broad.

FMCSA became a separate administration within U.S. DOT on January 1, 2000, under the Motor Carrier Safety Improvement Act of 1999. It is one part of DOT, rather than another name for the entire department. The agency’s mission and history page explains its role.

FMCSA develops and enforces safety regulations, uses safety data to focus oversight, provides educational information and works with state and local partners. Use the official agency website to identify the relevant program before submitting a filing or responding to a notice.

A USDOT number identifies an entity for safety monitoring. Operating authority concerns the activities the business is authorized to perform. An active USDOT record does not establish that all required authority is active.

FMCSA’s USDOT criteria address vehicle size, passenger operations, hazardous materials and interstate commerce. Some states also require USDOT numbers for intrastate operations. Determine the actual operation before applying; not every registrant needs an MC authority.

Compliance, Safety, Accountability (CSA) is FMCSA’s safety compliance and enforcement program. Its Safety Measurement System uses inspection, crash and investigation information to identify carriers for intervention.

“CSA score” is a common informal label. FMCSA cautions that SMS results are not a federal safety rating and should not alone determine a carrier’s overall safety condition. Check the data date, the meaning of the field and the separate official rating.

An inspection finding, intervention indicator, safety rating and out-of-service order have different meanings. Read the actual record or notice and any response deadline. The CSA program includes investigations and other interventions; a displayed measure is not itself an order shutting down the business.

The current federal regulations cover topics including driver qualifications, vehicle maintenance and operating requirements. Our hours-of-service and ELD definitions explain common starting points. Check the applicable rule and exceptions rather than treating a short glossary definition as a complete compliance checklist.

FMCSA works with state enforcement partners. Intrastate registration requirements can also come from your state, so check the responsible state agency. Programs such as IFTA have their own requirements; an FMCSA registration does not complete every other business obligation.

FMCSA’s current Motus instructions cover creating a user profile, verifying identity, creating or claiming a company account and managing registrations. Existing registrants should claim their existing record through the authorized company official. Use the agency’s current registration entry point for instructions.

For current registration records, use Motus public search. FMCSA says Licensing & Insurance is historical as of May 14, 2026 and does not reflect Motus filings. SAFER and SMS still answer different identification and safety questions.

Match the business identity, check the relevant registration and safety sources, and retain the date of your review. A directory copy can lag its source. Ask the insurer about actual coverage for a proposed shipment. If you find an incorrect inspection or crash record, use DataQs to request review with supporting information; submitting a request does not guarantee a change.

Our carrier lookup organizes stored public data and links to agency sources. For your own business’s recordkeeping needs, see compliance services. Keep compliance planning separate from estimates such as cost per mile.