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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
How does a driver record the hours spent driving in a school bus operation when he/she also drives a commercial motor vehicle (CMV) for a company subject to the Federal Motor Carrier Safety Regulations (FMCSRs)? FMCSA-HOS-395.2-Q21 Hours of Service Definitions
Are tractor protection valves required by § 393.43(b), or may similar devices be used? FMCSA-VEH-393.43-Q01 Are tractor protection valves required?
Driver Vehicle Inspection Reports FMCSA-VM-396.11-Q016 Driver vehicle inspection reports
Question 3: Must each vehicle in a combination carry separate periodic inspection documentation? FMCSA-VM-396.17-Q03.cm Separate periodic inspection documents for each unit in combination vehicle
When are tow trucks subject to financial responsibility coverage? FMCSA-INS-387.3-Q003 Applicability of Financial Responsibility Requirements to Towing
If a company owns more than one motor carrier subject to the Federal Motor Carrier Safety Regulations, may the company use logs listing the names of all such motor carrier employers and require the driver to identify the carrier for which he or she drives FMCSA-HOS-395.8-Q18 Hours of Service Records of Duty Status
Are Red Cross vehicles/drivers subject to the FMCSRs? FMCSA-RG-390.3T-Q007 Applicability of FMCSRs to Red Cross vehicles
Must a person who is injured in an accident and immediately receives treatment away from the scene of the accident be transported in an ambulance? FMCSA-RG-390.5T-Q018 Mode of transportation of persons injured in CMV accident
When a motor carrier receives a request for driver information from another motor carrier about a former or current driver, is it required to supply the requested information? FMCSA-DQ-391.23-Q001 Driver investigations and inquiries
May a motor carrier designate another person or organization to administer the road test? FMCSA-DQ-391.31-Q004 Road test