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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 do FMCSA’s ELDT regulations affect State-based training requirements? FMCSA-ELDT-380-Q027 Entry level Driver Training
May a driver use the adverse driving conditions provision even if the adverse conditions have cleared when the driver arrives at the location where the condition occurred? FMCSA-HOS-2020-395-FAQ14 Hours of Service
May a 10-consecutive hour off-duty period be paired with a subsequent qualifying 7+-consecutive hour sleeper berth period? FMCSA-HOS-2020-395-FAQ05-RESCINDED Hours of Service
How are split sleeper berth rest periods used in determining compliance with the 14-hour "driving window" rule? FMCSA-HOS-2020-395-FAQ04 Hours of Service
What if a driver is stopped for a roadside inspection after having taken only one rest period that qualifies for the split sleeper berth provision? FMCSA-HOS-2020-395-FAQ03 Hours of Service
Are there any restrictions on how often the adverse driving conditions exception may be used? FMCSA-HOS-2020-395-FAQ12 Hours of Service
What rest periods qualify for the split sleeper berth provision? FMCSA-HOS-2020-395-FAQ02 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
May the adverse driving conditions exception be used in concert with the revised short-haul provisions? FMCSA-HOS-2020-395-FAQ21 Hours of Service
May a driver use on-duty not driving time during a roadside inspection to satisfy the 30-minute break? FMCSA-HOS-2020-395-FAQ19 Hours of Service