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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 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
Are motor carriers that meet the agricultural exemption defined in 49 CFR 395.1(k) or the covered farm vehicle § 395.1(s) subject to the Electronic Logging Device (ELD) rule? FMCSA-ELD-395-Q031(2022-03-10) ELD Guidance
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
How can yard moves be reflected on the electronic logging device (ELD)? FMCSA-ELD-395-Q070(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
Are electronic logging devices (ELDs) required to be interoperable? FMCSA-ELD-395-Q033(2022-03-10) ELD Guidance
What is a manufacturer required to do when required data is not available from the electronic control module (ECM)? FMCSA-ELD-395-Q057(2022-03-10) ELD Guidance
Can the partial vehicle identification number (VIN) value obtained from the controller area network bus be used for reporting? FMCSA-ELD-395-Q035(2022-03-10) ELD Guidance
If the vehicle does not track engine hours, can the record begin with “0”? FMCSA-ELD-395-Q060(2022-03-10) ELD Guidance
How should an electronic logging device (ELD) record a driver’s hours of service when operating in another country such as Canada? FMCSA-ELD-395-Q038(2022-03-10) ELD Guidance