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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
In the ELD header, should miles driven reflect miles in the current commercial motor vehicle (CMV) or all CMVs that the driver has operated on the displayed date? What about Start End Odometer and Engine Hours? FMCSA-ELD-395-Q074(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
Can a carrier set parameters for yard moves via the technical specifications? FMCSA-ELD-395-Q073(2022-03-10) ELD Guidance
Can a mobile app and the vehicle engine communicate over a cellular network? FMCSA-ELD-395-Q034(2022-03-10) ELD Guidance
Are electronic logging devices (ELDs) required to be interoperable? FMCSA-ELD-395-Q033(2022-03-10) ELD Guidance
Is there a requirement to indicate odometer or positioning at the beginning and end of a Yard Move category? FMCSA-ELD-395-Q072(2022-03-10) ELD Guidance
What is the commercial motor vehicle (CMV) power unit number? FMCSA-ELD-395-Q071(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 a driver have more than one user account? FMCSA-ELD-395-Q032(2022-03-10) ELD Guidance
Can a driver select exempt driver status? FMCSA-ELD-395-Q024(2022-03-10) ELD Guidance