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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
§391.15 Disqualification of drivers. FMCSA-DQ-391.15-Q001 Driver disqualification
Question 1: What protection is afforded a driver for refusing to violate the Federal Motor Carrier Safety Regulations (FMCSRs)? FMCSA-DRV-392.3-Q001 Ill or fatigued driver
Must a person who is injured in an accident and immediately receives treatment away from the scene of the accident be transported in an ambulance? FMCSA-RG-390.5T-Q018 Mode of transportation of persons injured in CMV accident
§391.15 Disqualification of drivers FMCSA-DQ-391.15-Q006 n/a
What post-accident alcohol and drug testing requirements are there for U.S. employer’s drivers involved in an accident occurring outside the U.S.? FMCSA-D&A-382.303-Q04 Guidance on whether post-accident testing is required for U.S. employer’s drivers involved in an accident occurring outside the U.S.
May time spent in sleeping facilities being transported as cargo (e.g., boats, campers, travel trailers) be recorded as sleeper berth time? FMCSA-HOS-395.1-Q24 Hours of Service Exceptions
May the ‘‘park’’ position of a CMV’s transmission be used as a parking brake to comply with the § 393.41? FMCSA-VEH-393.41-Q01 “Park” position as parking brake
May a driver change to and from a driver-salesman status at any time? FMCSA-HOS-395.2-Q18 Hours of Service Definitions
For the purposes of § 393.89, would a spline and yoke that is secured by a nut be considered a sliding connection? FMCSA-VEH-393.89-Q01 What is a sliding connection under § 393.89?
At what GVWR, as assigned by a manufacturer, does the requirement to comply with the financial responsibility regulations begin? FMCSA-INS-387.3-Q001 GVWR at which Financial Responsibility Requirements apply