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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 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
If an interstate driver gets stopped by a State enforcement officer for an inspection, would the inspecting officer be enforcing the Federal regulations or State regulations? FMCSA-RG-390.9-Q001 Regulations enforced by State officers
Would the accident report retention requirement in §390.15(b)(2) include an ‘‘Adjuster’s Report’’ that is normally considered to be an internal document of an insurance company? FMCSA-RG-390.15-Q002 Retention of insurance “adjuster’s report”
May sleeper berth time and off-duty periods be combined to meet the 10-hour off-duty requirement? FMCSA-HOS-395.1-Q25 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?
Documents required for accident register FMCSA-RG-390.15-Q003 Documents required for accident register
What is the definition of ‘‘body’’ with respect to trucks and trailers? FMCSA-VEH-393.11-Q01
Footnote 5, requires that each converter dolly be equipped with turn signals at the rear FMCSA-VEH-393.11-Q03 Turn signals at the rear of converter dolly
Section 390.23 provides that parts 390 through 399 do not apply to any motor carrier or driver operating a CMV to provide direct assistance in an emergency. Is a motor carrier or driver required to keep a record of the driver’s on-duty or driving time whi FMCSA-RG-390.23-Q002 Emergency, Recordkeeping, Direct Assistance, 390.23
What are the lighting requirements when a tow truck is pulling a wrecked or disabled vehicle? FMCSA-VEH-393.17-Q01