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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
Is a nonprofit corporation, providing for-hire interstate transportation of passengers, subject to the minimum levels of financial responsibility for motor carriers of passengers? FMCSA-INS-387.27-Q001 Applicability of financial responsibility requirements to nonprofit corporation providing for-hire interstate transportation of passengers
Can a for-hire motor carrier located in Canada transport farm supplies and/or equipment for agricultural purposes to a location in the U.S. without having to comply with Part 395? FMCSA-HOS-AG-395.1-FAQ32 Hours of Service Agricultural Commodities
What constitutes a “serious pattern” of violations? FMCSA-RG-390-SPECIALTOPICS-Q01 What is a “serious pattern” of violations?
§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
Must all drivers who do not work for an extended period of time (such as layoffs over the winter or summer months) be pre-employment drug tested each season when they return to work? FMCSA-D&A-382.301-Q04 Pre-employment testing requirement for drivers who do not work for an extended period of time
May specially trained drivers of specially constructed oil well servicing vehicles cumulate the 8 consecutive hoby combining off-duty time or sleeper-berth time at a natural gas or oil well site with off duty while en route to or from the well? FMCSA-HOS-395.1-Q11 Hours of Service Exceptions
A driver has tested positive and completed the referral and evaluation process up to the point of being released by the SAP for a return-to-duty test. FMCSA-D&A-382.309-Q01 Drug & Alcohol Testing – Reasonable Suspicion
Is the low pressure warning device required to activate before the tractor protection valve? FMCSA-VEH-393.51-Q01 Must the low-pressure warning device activate before the tractor protection valve?