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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 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 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
Are drivers required to be dedicated permanently to the oilfield industry? FMCSA-HOS-395.1-Q09 Hours of Service Exceptions
Occasionally, the driver has leftover materials that must be transported back to a motor carrier facility or service depot. Would such a return trip be covered by §395.1(d)(1)? FMCSA-HOS-395.1-Q10 Hours of Service Exceptions
May a decal designed to comply with the periodic inspection documentation requirements of § 396.17 be displayed on the windshields or side windows of a CMV? FMCSA-VEH-393.60-Q02 May CVSA decals be displayed on windows?
May windshields and side windows be tinted? FMCSA-VEH-393.60-Q01 Tinting of windshields and side windows
If a crack extended into the thickness of the glass at such an angle FMCSA-VEH-393.60-Q03 Definition of ¼” windshield crack
When calculating the minimum emergency exit space required on school buses used in non-school bus operations, should two or three passengers per bench seat be used in determining the adult seating capacity? FMCSA-VEH-393.62-Q02 Seating capacity of school buses used for adults