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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 §391.63 apply when motor carriers obtain, from a driver leasing service, intermittent, casual, or occasional drivers who are on temporary assignments to multiple motor carriers? FMCSA-DQ-391.63-Q002 Multiple-employer drivers
Part 390 § 390.3T General applicability Question 21 FMCSA-RG-390.3T-Q021 Extent of exception for transportation of personal property
Do the physical qualification requirements of the FMCSRs infringe upon a person’s religious beliefs if such beliefs prohibit being examined by a licensed doctor of medicine or osteopathy? FMCSA-MED-391.41-Q2 Driver Physical Qualification Standards
What must an employer do to avail itself of the exceptions to pre-employment testing listed under §382.301(c)? FMCSA-D&A-382.301-Q05 What an employer must do to avail itself of the exceptions to pre-employment testing listed under §382.301(c)
Question 10: Can an employee receive the follow-up from an SAP who did not conduct the initial SAP evaluation? FMCSA-D&A-382.605-Q10 Drug & Alcohol Testing – Initial and Follow-up SAP Evaluations
May drivers who work split shifts take advantage of the 100-air-mile radius exemption found at §395.1(e)? FMCSA-HOS-395.1-Q19 Hours of Service Exceptions
Section 390.23 provides that parts 390 through 399 do not apply to any motor carrier or driver operating a CMV to provide direct assistance in an emergency. Is a motor carrier or driver required to keep a record of the driver’s on-duty or driving time whi FMCSA-RG-390.23-Q002 Emergency, Recordkeeping, Direct Assistance, 390.23
Do telephone calls to or from the motor carrier that momentarily interrupt a driver’s rest period constitute a change of the driver’s duty status? FMCSA-HOS-395.2-Q05 Hours of Service Definitions
How should I secure the accessories for an item of construction equipment which weighs 4,536 kg (10,000 lb.) or more, if the accessory devices would extend beyond the width of the trailer if they are lowered to the deck for transport? FMCSA-RG-393.130Q02 How should the overwidth accessories of construction equipment be secured?
Driver vehicle inspection reports FMCSA-VM-396.11-Q004 Driver vehicle inspection reports