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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
Will the Federal Motor Carrier Safety Administration (FMCSA) collect State enforcement agency data transfer capabilities/preferences? FMCSA-HOS-ELD-TECH-395-FAQ68(2017-09-01)-CORR1 ELD Guidance
If a driver operates with multiple commercial motor vehicles (CMVs), which CMV’s records must be included in the ELD file? FMCSA-HOS-ELD-TECH-395-FAQ71(2017-09-01)-CORR1 ELD Guidance
For ELD Event Annotations or Comments records in sections 4.8.2.1.5 (ELD Data File) of 49 CFR part 395, subpart B, Appendix A, what do the <{Event} Date> and <{Event} Time> refer to? FMCSA-HOS-ELD-TECH-395-FAQ75(2017-09-01)-CORR1 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
For telematics data transfer, which email address should be used in the recipient field? FMCSA-HOS-ELD-TECH-395-FAQ78(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
ELD FAQ 84: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ84 ELD Guidance
ELD FAQ 57: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ57-RESCINDED ELD Guidance
ELD FAQ87: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ87-RESCINDED ELD Guidance
Is the ELD required to retrieve the CMV position from the device connected to the port, or can this be retrieved by using a smartphone or tablet? FMCSA-HOS-ELD-TECH-395-FAQ21