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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
Is it permissible to allow the electronic logging device (ELD) to power up, boot, and accept driver logins before the engine is powered?  FMCSA-ELD-395-Q056(2022-03-10) ELD Guidance
Can a carrier set parameters for yard moves via the technical specifications? FMCSA-ELD-395-Q073(2022-03-10) ELD Guidance
How should the electronic logging device (ELD) handle the dashboard odometer display not matching the odometer value returned by the electronic control module (ECM)? For instance, when the engine is replaced and the value is not synced. FMCSA-ELD-395-Q059(2022-03-10) ELD Guidance
Does the Electronic Logging Device (ELD) rule require that an ELD be able to both display electronically and print? FMCSA-ELD-395-Q037(2022-03-10) ELD Guidance
If a driver is permitted to use a commercial motor vehicle (CMV) for personal reasons, how must the driving time be recorded? FMCSA-HOS-ELD-395-FAQ62(2022-03-10) ELD Guidance
How may a driver using the sleeper berth provision obtain the off-duty time required by 395.3(a)(1)? FMCSA-HOS-2020-395-FAQ01 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
When must a driver take a 30-minute break? FMCSA-HOS-2020-395-FAQ16 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
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