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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
How will State Driver Licensing Agencies (SDLAs) use the Clearinghouse? FMCSA-D&A-CLEAR-382.725-FAQ001(2022-01-27) Controlled Substances and Alcohol Testing: State Driver’s Licensing Agency Non-Issuance/ Downgrade of Commercial Driver’s License
Qualifications of Drivers; Vision Standard, 87 FR 3390 (Jan. 21, 2022) FMCSA-FR-87FR3390(2022-01-21) Driver Physical Qualification Standard for Vision
What are the physical qualification requirements for operating a CMV in interstate commerce? FMCSA-MED-391.41-Q3(2022-01-21) Driver Physical Qualification Standards
Is a motor carrier that is subject to Part 382 allowed to query the Drug and Alcohol Clearinghouse (Clearinghouse) for drivers who hold a commercial driver’s license (CDL) but who are operating only non-CDL-required commercial motor vehicles (CMVs) in ... FMCSA-D&A-CLEAR-382.701-FAQ009 Drug and Alcohol Clearinghouse
How do FMCSA’s ELDT regulations affect State-based training requirements? FMCSA-ELDT-380-Q027 Entry level Driver Training
What rest periods qualify for the split sleeper berth provision? FMCSA-HOS-2020-395-FAQ02 Hours of Service
May a driver use yard moves to satisfy the 30-minute break requirement? FMCSA-HOS-2020-395-FAQ20 Hours of Service
May the adverse driving conditions exception be used in concert with the revised short-haul provisions? FMCSA-HOS-2020-395-FAQ21 Hours of Service
If it only takes an hour for a driver to get through the adverse driving conditions, do they still get to use the full 2 hours of the exception? FMCSA-HOS-2020-395-FAQ13 Hours of Service
Does the 30-minute break have to be consecutive? FMCSA-HOS-2020-395-FAQ17 Hours of Service