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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
Section § 382.605: Referral, evaluation, and treatment FMCSA-D&A-382.605-Q01 Guidance on SAP evaluation
May windshields and side windows be tinted? FMCSA-VEH-393.60-Q01 Tinting of windshields and side windows
Regulatory Guidance for the Federal Motor Carrier Safety Regulations, 62 Fed. Reg. 16370 FMCSA-FR-62FR16370.1997.04.04 Federal Motor Carrier Safety Regulations
If a motor carrier operates under the 70-hour/8-day rule, does any aspect of the 60-hour rule apply to its operations? FMCSA-HOS-395.3-Q06 Hours of Service Maximum Driving Time
Question 1: If a DVIR does not indicate that certain defects have been repaired, and the motor carrier has not certified in writing that such repairs were considered unnecessary, may the driver refuse to operate the motor vehicle? FMCSA-VM-396.13-Q1.cm Prohibition to operate vehicle without certification of repairs
Is there a required form for the periodic inspection? FMCSA-VM-396.17-Q11.cm
Question 4: Is computerized recordkeeping of CMV inspection and maintenance information permissible under § 396.3 of the FMCSRs? FMCSA-VM-396.3-Q004 Vehicle inspection, repair and maintenance
What types of equipment are included in the category of off-road motorized construction equipment? FMCSA-RG-390.5T-Q008 Meaning of “off-road motorized construction equipment”
If a driver commits a felony while operating a CMV but not in the employ of a motor carrier, is the offense disqualifying? FMCSA-DQ-391.15-Q009 Driver disqualification
Does the definition of a ‘‘commercial motor vehicle’’ in § 390.5T of the FMCSRs include parking lot and/or street sweeping vehicles? FMCSA-RG-390.5T-Q015 Street-sweeping machines as CMVs