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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
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
Does a medical certificate displaying a facsimile of a medical examiner’s signature meet the “signature of examining health care professional” requirement? FMCSA-MED-391.43-Q5 Signature on Medical Examiner’s Certificate
In a governmental entity structured into various subunits such as departments, divisions, and offices, how is the number of an employer’s drivers determined for purposes of the implementation date of controlled substances and alcohol testing? FMCSA-D&A-382.115-Q01 Implementation of drug and alcohol testing program for governmental units that employ CDL drivers
Question 2: Does §382.601 require employers to provide educational materials and policies and procedures to drivers after the initial distribution of required educational materials? FMCSA-D&A-382.601-Q02 Drug & Alcohol Testing – Educational Materials on Alcohol Misuse and Controlled Substances Use
Must all trailers be equipped with overload protective devices? FMCSA-VEH-393.28-Q02 Overload protective devices for trailers
What work may the driver perform for an employer, if a driver violates the prohibitions in subpart B? FMCSA-D&A-382.413-Q01 Drug & Alcohol Testing – Removal from Safety Sensitive Functions
Must a driver engaged in union activities affecting the employing motor carrier record such time as on-duty (not driving) time? FMCSA-HOS-395.2-Q16 Hours of Service Definitions
If a crack extended into the thickness of the glass at such an angle FMCSA-VEH-393.60-Q03 Definition of ¼” windshield crack