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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 what format should I submit my public key to the Federal Motor Carrier Safety Administration (FMCSA)? FMCSA-HOS-ELD-TECH-395-FAQ92(2017-09-01)-CORR1 ELD Guidance
ELD FAQ 95: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ95 ELD Guidance
Regarding section 4.8.2.1.9 of 49 CFR part 395, subpart B, Appendix A, which power up and shut down events should be included? FMCSA-HOS-ELD-TECH-395-FAQ76(2017-09-01)-CORR1 ELD Guidance
ELD FAQ 77 :Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ77-RESCINDED ELD Guidance
If the required ELD data from the ECM is private and requires an agreement with the original equipment manufacturer (OEM) to obtain said data, are ELD providers required to enter an agreement with the OEM? FMCSA-HOS-ELD-TECH-395-FAQ23 Electronic Logging Devices and Hours of Service – Technical Specifications
Section 4.8.1.2 of 49 CFR part 395 subpart B, Appendix A requires that an electronic logging device (ELD) without a printer be designed so that “the display may be reasonably viewed by an authorized safety official without entering the commercial motor... FMCSA-HOS-ELD-TECH-395-FAQ55(2017-09-01)-CORR1 ELD Guidance
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
If the vehicle does not track engine hours, can the record begin with “0?” FMCSA-HOS-ELD-TECH-395-FAQ25 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
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