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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
ELD Data Transfer FAQs FMCSA-ELD-Data-Transfer-FAQs(2022-03-10) ELD Guidance
When an event is recorded by an electronic logging device (ELD) component not connected to a powered-on power unit, is the information pertaining to the power unit required? FMCSA-ELD-395-Q067(2022-03-10) ELD Guidance
Is the electronic logging device (ELD) required to retrieve the commercial motor vehicle (CMV) position from the device connected to the port, or can this be retrieved by using a smartphone or tablet? FMCSA-ELD-395-Q079(2022-03-10) ELD Guidance
ELD Technical Specifications FAQs FMCSA-ELD-Technical-Specifications-FAQs(2022-03-10) ELD Guidance
Can an electronic logging device (ELD) be on a smartphone or other wireless device? FMCSA-ELD-395-Q029(2022-03-10) ELD Guidance
Section 4.6.1.6(d) of 49 CFR part 395, subpart B, Appendix A states that “An unidentified driving records data diagnostic event can be cleared by the ELD when driving time logged under the unidentified driver profile for the current 24‐hour period and... FMCSA-ELD-395-Q049(2022-03-10) ELD Guidance
When is the electronic logging device (ELD) required to automatically change the driver’s duty status to Driving? FMCSA-ELD-395-Q069(2022-03-10) ELD Guidance
If the driver rejects unidentified driving, should that be displayed on the electronic logging device (ELD) for the roadside inspection view and output file view? FMCSA-ELD-395-Q052(2022-03-10) ELD Guidance
What is the commercial motor vehicle (CMV) power unit number? FMCSA-ELD-395-Q071(2022-03-10) ELD Guidance
Can an electronic logging device (ELD) provider pass the one-minute boot time rule by requiring the driver to power on the device (or an app) prior to starting the engine? FMCSA-ELD-395-Q055(2022-03-10) ELD Guidance