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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
May a driver domiciled in the United States comply with the Canadian hours of service regulations while driving in Canada? FMCSA-HOS-395.3-Q05 Hours of Service Maximum Driving Time
May a driver record sleeper berth time as off-duty time on line one of the record of duty status? FMCSA-HOS-395.1-Q26 Hours of Service Exceptions
If a driver is transported by automobile from the point of a breakdown to a terminal, and then dispatched on another run, how is the time spent in the automobile entered on the record of duty status? FMCSA-HOS-395.2-Q24 Hours of Service Definitions
What is the liability of a motor carrier for hours of service violations? FMCSA-HOS-395.3-Q07 Hours of Service Maximum Driving Time
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
May a truck driver use the adverse driving conditions exception if he/she has accumulated driving time and on-duty (not driving) time, that would put the driver over 14 hours or over 70 hours in 8 consecutive days? FMCSA-HOS-395.1-Q03 Hours of Service Exceptions
Is it a violation of the Federal Motor Carrier Safety Regulations (FMCSRs) to operate a commercial motor vehicle (CMV) from the last stop to home and not show that time on the time cards? FMCSA-HOS-395.2-Q01 Hours of Service Definitions
How should the time spent when drivers volunteer as firefighters be logged on the record of duty status when the drivers return to work? FMCSA-HOS-395.2-Q27 Hours of Service Definitions
If a driver’s record of duty status is not signed, may enforcement action be taken on the current day’s record if it contains false information? FMCSA-HOS-395.3-Q03 Hours of Service Maximum Driving Time
What is considered “oilfield equipment” for the purposes of 395.1(d)(1)? FMCSA-HOS-395.1-Q07 Hours of Service Exceptions