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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
If the unidentified driving time is accepted by the driver, will the electronic logging device (ELD) still show the driving time as unidentified? FMCSA-ELD-395-Q051(2022-03-10) ELD Guidance
Section 4.6.1.6(d) of 49 CFR part 395, subpart B, Appendix A states that “An unidentified driving records data diagnostic event can be cleared by the ELD when driving time logged under the unidentified driver profile for the current 24‐hour period and... FMCSA-ELD-395-Q049(2022-03-10) ELD Guidance
If a driver forgets to indicate the start of Personal Conveyance (PC) or Yard Moves (YM), can they later edit that automatically generated driving event to PC (Off Duty) or YM (On Duty Not Driving)? FMCSA-ELD-395-Q081(2022-03-10) ELD Guidance
How should “odometer jumps,” caused by a driver unplugging the electronic logging device (ELD) from the electronic control module (ECM), be captured? FMCSA-ELD-395-Q053(2022-03-10) ELD Guidance
Can an electronic logging device (ELD) provider pass the one-minute boot time rule by requiring the driver to power on the device (or an app) prior to starting the engine? FMCSA-ELD-395-Q055(2022-03-10) ELD Guidance
Can electronic logging device (ELD) events remain unassigned after a trip is assigned to a driver? FMCSA-ELD-395-Q054(2022-03-10) ELD Guidance
Under the sleeper berth provisions, a driver takes 7 hours in the sleeper berth & later takes an off-duty period of 3 hours before arriving at home. When the driver arrives home within the permissible hours, what rest is req’d to reset their "day clock"? FMCSA-HOS-2020-395-FAQ08 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