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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
Can the partial VIN value obtained from the controller area network bus be used for reporting? FMCSA-HOS-ELD-TECH-395-FAQ22 Electronic Logging Devices and Hours of Service – Technical Specifications
What information should be displayed on the header for co-driver operations? FMCSA-HOS-ELD-TECH-395-FAQ65(2017-09-01)-CORR1 ELD Guidance
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
ELD FAQ 56: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ56-RESCINDED ELD Guidance
In a portable device platform, should the event identifier sequence number be associated with the portable device or the vehicle’s black box? FMCSA-HOS-ELD-TECH-395-FAQ28 Electronic Logging Devices and Hours of Service – Technical Specifications
ELD FAQ 57: Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ57-RESCINDED ELD Guidance
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
ELD FAQ 83:Electronic Logging Devices and Hours of Service – Technical Specifications FMCSA-HOS-ELD-TECH-395-FAQ83-RESCINDED ELD Guidance
In Section 4.6.1.7, the rule requires that “an ELD must verify [data transfer] functionality every seven days.” What does this mean? FMCSA-HOS-ELD-TECH-395-FAQ31 Electronic Logging Devices and Hours of Service – Technical Specifications
Can the required electronic logging device (ELD) user manual be in digital format? FMCSA-HOS-ELD-TECH-395-FAQ86(2017-09-01)-CORR1 ELD Guidance