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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
Does the FMCSA issue formal medical decisions as to the physical qualifications of drivers on an individual basis? FMCSA-MED-391.47-Q1 Resolution of Medical Conflicts
Recordkeeping requirements for electronic HOS files FMCSA-ELD-HOS-395.15-Q01 Recordkeeping requirements for electronic HOS files
What post-accident alcohol and drug testing requirements are there for foreign drivers involved in accidents occurring outside the United States? FMCSA-D&A-382.303-Q05 Post-accident drug testing requirements for foreign drivers
What is considered “oilfield equipment” for the purposes of 395.1(d)(1)? FMCSA-HOS-395.1-Q07 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?
(395.8-Q20) FMCSA-HOS-395.8-Q20 RODS and the 100 air-mile radius exemption
How does a Mexican motor carrier demonstrate that its insurance company complies with §387.11? FMCSA-INS-387.11-Q001 Mexican carrier compliance with 387.11
May a driver operate any motor vehicle, at the direction of the motor carrier, after being placed out of service for an hours of service violation? FMCSA-HOS-395.13-Q01 operation of motor vehicles when declared Out-of-Service