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Regulatory Guidance

Welcome to the FMCSA Guidance Portal. This web portal is a searchable, indexed database that contains and links to all guidance documents in effect from the Federal Motor Carrier Safety Administration. The guidance documents lack the force and effect of law, unless expressly authorized by statute or incorporated into a contract.

To comment on any guidance document, or to request issuance, reconsideration, modification, or rescission of any guidance document, please identify the guidance document in your request and send it to: FMCSAguidance@dot.gov. NOTE: The FMCSAguidance mailbox is not intended to serve as a mailbox for general inquiries. For inquiries that go beyond the limited purpose of the FMCSAguidance mailbox, please call FMCSA's Information Line (800-832-5660) or visit FMCSA's "Contact Us" page to send your inquiry to the appropriate mailbox.

Subject Agency Identifier Topic Issued Date
When are drivers subject to the DOT Drug and Alcohol testing requirements? FMCSA-D&A-382.103-FAQ003 Guidance on when a driver is subject to the FMCSA drug and alcohol testing requirements.
ELD Training Checklist for Motor Carriers: Understanding Your Device FMCSA-HOS-ELD-TRAINING-395-FAQ1 ELD Guidance
Brochure provides overview of the hours-of-service rules for drivers of passenger-carrying commercial motor vehicles. FMCSA-HOS-PASS-395-PASSENGER CARRIER HOURS OF SERVICE BROCHURE Passenger Carrier Hours of Service
May the CDL knowledge test be administered by a third party? FMCSA-CDL-383.75-Q01-RESCINDED Commercial Driver License Standards; Third Party Testing
Commercial Driver's License Standards, Requirements and Penalties; Notification of Updated Regulatory Guidance; Request for Comments, 84 Fed. Reg. 8464 FMCSA-FR-84FR8464-2019-03-08 Guidance for Commercial Drivers Licenses
Are public transit employees known as “hostlers,” who maintain and park transit buses on transit system property, subject to CDL requirements? FMCSA-CDL-383.3-Q10 Commercial Driver License Standards; Passenger Carrier
When a State agency contracts with private parties for services involving the operation of CMVs, is the State agency or contractor considered the employer? FMCSA-CDL-383.5-Q2 Commercial Driver License Standards; State Contracts
Is a driver who has a CDL and has been convicted of a felony disqualified from operating a CMV under the FMCSRs? FMCSA-CDL-383.37-Q2 Commercial Driver License Standards; Felony Conviction
May a truck tractor (as defined in 49 CFR 390.5) be driven on public roads by a driver with a Class B CDL? FMCSA-CDL-383.91-Q06 Commercial Driver License Standards; Class B Truck Tractor CDL Requirements
Must a civilian operator of a CMV, as defined in § 383.5, who operates wholly within a military facility open to public travel, have a CDL? FMCSA-CDL-383.3-Q12 Commercial Driver License Standards – Civilian CMV Operators Within Military Facility