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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
§391.11 General qualifications of drivers. FMCSA-DQ-391.11-Q003 General driver qualifications
Are trailers which are stacked upon each other and drawn by a motor vehicle by attachment to the bottom trailer, a driveaway-towaway operation. FMCSA-RG-390.5T-Q024 Stacked trailers in driveaway-towaway operations
Do the definitions of "farm", "farmer" and "agricultural crops" apply to greenhouse operations? FMCSA-RG-390.5T-Q001 Applicability of farm-related definitions to greenhouse operations
Are trailers which are stacked upon each other and drawn by a motor vehicle by attachment to the bottom trailer, a driveaway-towaway operation? FMCSA-RG-390.5T-Q024 Stacked trailers in driveaway-towaway operations
Question 13: Can random testing be substituted for required follow-up testing? FMCSA-D&A-382.605-Q13 Drug & Alcohol Testing – Random Testing in Lieu of Follow-up Testing
Is the driver required to record meal and other routine stops as off-duty time, or is it the driver’s decision whether such time is recorded as off-duty? FMCSA-HOS-395.2-Q03 Hours of Service Definitions
How should time spent at National Guard meetings and training sessions be recorded for the hours of service requirements? FMCSA-HOS-395.2-Q28 Hours of Service Definitions
Are the brakes on a vehicle towed in a driveaway-towaway operation or towed disabled vehicle required to be operable at all times? FMCSA-VEH-393.48-Q03 Are operable brakes required on disabled or driveaway-towaway vehicles?
When calculating the minimum emergency exit space required on school buses used in non-school bus operations, should two or three passengers per bench seat be used in determining the adult seating capacity? FMCSA-VEH-393.62-Q02 Seating capacity of school buses used for adults
Does § 393.104(b) require that securement devices be marked or labeled with their working load limit or any other information? FMCSA-VEH-393.104-Q02 Marking of securement devices with working load limits