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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
Recordkeeping requirements for electronic HOS files FMCSA-ELD-HOS-395.15-Q01 Recordkeeping requirements for electronic HOS files
May an automatic on-board recording device use an algorithm to identify the location of each change in duty status relative to the nearest city, town, or village? FMCSA-ELD-HOS-395.15-Q03 AOBRD use of algorithm
Are automatic on-board recorders (AOBRDs) required to be designed and maintained to prevent team drivers in a non-driving duty status from making updates to their electronic record of duty status while the vehicle is in motion? FMCSA-ELD-HOS-395.15-Q04 When a non-driver may update their eROD
What hours-of-service regulations apply to drivers operating between the United States and Mexico or between the United States and Canada? FMCSA-HOS-395.1-Q01 Hours of Service
If a driver invokes the exception for adverse driving conditions, does a supervisor need to sign the driver’s record of duty status when he/she arrives at the destination? FMCSA-HOS-395-Q02 Hours of Service Exception
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
Are there allowances made in the Federal Motor Carrier Safety Regulations (FMCSRs) for delays caused by loading and unloading? FMCSA-HOS-395.1-Q04 Hours of Service of Exceptions
How may a driver utilize the adverse driving conditions exception or the emergency conditions exception as found in §395.1(b), to preclude an hours of service violation? FMCSA-HOS-395.1-Q05 Hours of Service Exemptions
What is considered “oilfield equipment” for the purposes of 395.1(d)(1)? FMCSA-HOS-395.1-Q07 Hours of Service Exceptions
What kinds of oilfield equipment may drivers operate while taking advantage of the special rule of Section 395.1(d)(2)? FMCSA-HOS-395.1-Q08 Hours of Service Exceptions