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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
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
(395.8-Q12) FMCSA-HOS-395.8-Q12 Hours of Service Records of Duty Status
What is considered “oilfield equipment” for the purposes of 395.1(d)(1)? FMCSA-HOS-395.1-Q07 Hours of Service Exceptions
How does §391.63 apply when motor carriers obtain, from a driver leasing service, intermittent, casual, or occasional drivers who are on temporary assignments to multiple motor carriers? FMCSA-DQ-391.63-Q002 Multiple-employer drivers
Are drivers required to be dedicated permanently to the oilfield industry? FMCSA-HOS-395.1-Q09 Hours of Service Exceptions
Question 11: Who is responsible for reimbursing the SAP for services rendered? Who is responsible for paying for follow-up testing recommended by the SAP? FMCSA-D&A-382.605-Q11 Drug & Alcohol Testing – Payment for SAP Services and Follow-up Testing
To what extent would the windshield and/or mirrors of a vehicle have to be damaged in order for it to be considered ‘‘disabling damage’’ as used in the definition of an accident in § 390.5T? FMCSA-RG-390.5T-Q013 Extent of definition of “disabling damage”