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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 step be a rung? If so, what minimum diameter must the rung be? FMCSA-RG-399.207-FAQ04 Access requirements for truck and truck-tractor cabs
What documentation must a driver claiming the 100-air-mile radius exemption (§395.1(e)) have in his/her possession? FMCSA-HOS-395.1-Q13 Hours of Service Exceptions
A driver returns to his/her normal work reporting location from a location beyond the 100-air-mile radius and goes off duty for 7 hours. May the driver return to duty after being off-duty for 7 hours and utilize the 100-air-mile radius exemption? FMCSA-HOS-395.1-Q22 Hours of Service Exceptions
Are there any special lighting requirements for large containers? FMCSA-VEH-393.25-Q02 Lighting requirements for large containers
May an employer or consortium include non-U.S. Department of Transportation (DOT)-covered employees in a random pool with U.S. Department of Transportation (DOT)-covered employees? FMCSA-D&A-382.305-Q15 Employers placing non-DOT -covered employees in a random pool
If a “driver trainer” occasionally drives a commercial motor vehicle (CMV), thereby becoming a “driver” (regardless of whether he/she is paid for driving), must the driver record all non driving (training) time as on-duty (not driving)? FMCSA-HOS-395.2-Q08 Hours of Service Definitions
May a fuel fill pipe opening be placed above the passenger floor level if it is not physically within the passenger compartment? FMCSA-VEH--393.65Q01 Placement of fuel pipe opening relative to passenger compartment
Driver vehicle inspection report FMCSA-VM-396.11-Q009 Driver vehicle inspection Certification
Question 9: Is a State required to accept the periodic inspection program of another State having a periodic inspection program meeting minimum FMCSA standards as contained in appendix G to the FMCSRs? FMCSA-VM-396.17-Q09.cm Federally-approved State inspections must be accepted by all other States
Is the financial responsibility requirement met when an owner-operator (lessor) provides the motor carrier (lessee) a copy of the policy and Form MCS-90 where the carrier is named as an additional insured to the policy (Form MCS-90)? FMCSA-INS-387.7-Q004 Compliance with financial responsibility requirements where carrier leases vehicle from owner operator