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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
Would it be acceptable for the data transfer to be initiated by the electronic logging device (ELD) but relayed through and communicated to the Federal Motor Carrier Safety Administration (FMCSA) Service from the provider’s backend? FMCSA-HOS-ELD-TECH-395-FAQ66(2017-09-01)-CORR1 ELD Guidance
Would server‐based events (e.g., edits and assignment of unassigned events) generate a different sequence ID than that generated by the ELD? FMCSA-HOS-ELD-TECH-395-FAQ27 Electronic Logging Devices and Hours of Service – Technical Specifications
If a multi-function portable device is used for the front end of the electronic logging device (ELD) (i.e., user may be in a global positioning system [GPS] application and need to switch back to the ELD application), does this count as a click in the... FMCSA-HOS-ELD-TECH-395-FAQ67(2017-09-01)-CORR1 ELD Guidance
What if there is no internet connectivity to perform telematics data transfer between the electronic logging device (ELD) and the safety official? FMCSA-HOS-ELD-TECH-395-FAQ81(2017-09-01)-CORR1 ELD Guidance
Can the driver’s license information be omitted or redacted from the printed logs? FMCSA-HOS-ELD-TECH-395-FAQ58(2017-09-01)-CORR1 ELD Guidance
ELD FAQ 84: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ84 ELD Guidance
How should an ELD respond to battery issues, such as an ELD battery dying due to high temperatures or when charge power runs out? FMCSA-HOS-ELD-TECH-395-FAQ32 Electronic Logging Devices and Hours of Service – Technical Specifications
ELD FAQ 74: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ74 ELD Guidance
As specified in section 4.8.2.1.1 of 49 CFR part 395, subpart B, Appendix A, the electronic logging device (ELD) output file must have one line for co-driver information and one line for commercial motor vehicle (CMV) information. How can the ELD... FMCSA-HOS-ELD-TECH-395-FAQ70(2017-09-01)-CORR1 ELD Guidance
ELD FAQ87: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ87-RESCINDED ELD Guidance