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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
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
Are Canada- and Mexico-domiciled drivers required to use electronic logging devices (ELDs) when they are operating in the United States (U.S)? FMCSA-HOS-ELD-395-FAQ23(2022-03-10) ELD Guidance
Would server-based events (e.g., edits and assignment of unassigned events) generate a different sequence ID than that generated by the electronic logging device (ELD)? FMCSA-ELD-395-Q061(2022-03-10) ELD Guidance
When should a driver who has experienced an electronic logging device (ELD) malfunction switch to paper record of duty status (RODS)? FMCSA-ELD-395-Q040(2022-03-10) ELD Guidance
Does the size requirement for print display listed in section 4.8.1.3(c)(1) of 49 CFR part 395 subpart B Appendix A also apply to the on-screen display? FMCSA-HOS-ELD-TECH-395-FAQ56(2022-03-10) ELD Guidance
How should an electronic logging device (ELD) respond to battery issues, such as an ELD battery dying due to high temperatures or when charge power runs out? FMCSA-ELD-395-Q062(2022-03-10) ELD Guidance
Is the ELD required to automatically change duty status from Sleeper Berth to Driving upon sensing movement? FMCSA-ELD-395-Q076(2022-03-10) ELD Guidance