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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 the motor carrier meet the financial responsibility requirements by aggregating insurance in layers? FMCSA-INS-387.15-Q001 Aggregation of insurance to meet financial responsibility requirements
Are the FMCSRs applicable to the rail movement of trailers and intermodal container chassis that previously or subsequently were moved by highway by a motor carrier in interstate commerce? FMCSA-RG-390.3T-Q004 Applicability of FMCSRs to rail movements of intermodal chassis
§391.2 General exemptions FMCSA-DQ-391.2-Q001 Driver qualification exemptions
May a carrier use a blanket certification of road test for specific vehicles (driver’s names, etc., left out)? FMCSA-DQ-391.31-Q003 Road test
How should a random testing program be structured to account for the schedules of school bus or other drivers employed on a seasonal basis? FMCSA-D&A-382.305-Q03 How to structure random testing program to account for the schedules of school bus or other drivers employed who work on a seasonal basis
After what period of time may an employer remove a casual driver from a random pool? FMCSA-D&A-382.305-Q09 Guidance on when an employer may remove a casual driver from the random pool
Are drivers required to be dedicated permanently to the oilfield industry? FMCSA-HOS-395.1-Q09 Hours of Service Exceptions
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
Question 16: Can an SAP recommend that six follow-up tests be conducted in less than six months and then be suspended after all six are conducted? FMCSA-D&A-382.605-Q16 Drug & Alcohol Testing – Follow-up Testing Period
How many times may a motor carrier relieve a driver from duty within a tour of duty? FMCSA-HOS-395.2-Q23 Hours of Service Definitions