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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
Occasionally, the driver has leftover materials that must be transported back to a motor carrier facility or service depot. Would such a return trip be covered by §395.1(d)(1)? FMCSA-HOS-395.1-Q10 Hours of Service Exceptions
Applicability of FMCSRs when schools charge trip fees FMCSA-RG-390.3T-Q011 Applicability of FMCSRs when schools charge trip fees
What protection is afforded a driver for refusing to violate the FMCSRs? FMCSA-RG-390.3T-Q017 Protection of drivers sanctioned for refusal to violate FMCSRs
Part 390 § 390.3T General applicability Question 21 FMCSA-RG-390.3T-Q021 Extent of exception for transportation of personal property
Recordkeeping requirements for electronic HOS files FMCSA-ELD-HOS-395.15-Q01 Recordkeeping requirements for electronic HOS files
If a crack extended into the thickness of the glass at such an angle FMCSA-VEH-393.60-Q03 Definition of ¼” windshield crack
Are automatic on-board recorders (AOBRDs) required to be designed and maintained to prevent team drivers in a non-driving duty status from making updates to their electronic record of duty status while the vehicle is in motion? FMCSA-ELD-HOS-395.15-Q04 When a non-driver may update their eROD
Section 393.70(d) requires that every full trailer must be coupled to the frame FMCSA-VEH-393.70-Q03 Two sets of safety chains attached to draw bar