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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
Part 390 § 390.23 Relief from regulations How do I need to identify my vehicle when providing direct assistance? What paperwork must I carry? FMCSA-RG-390.23-FAQ012 Emergency Declarations
What are the differences in the technical specifications in the 1988 automatic onboard recording device (AOBRD) Rule (49 CFR 395.15) and the Electronic Logging Device (ELD) rule? FMCSA-ELD-395-AOBRD-and-ELD-FAQ-RESCINDED ELD Guidance
Cross Border Transportation FAQs FMCSA-ELD-Cross-Border-Transportation-FAQs(2018-04-09)-CORR1-RESCINDED ELD Guidance
Is Your Device Compliant? FMCSA-HOS-ELD-TECH-395-FAQ98 ELD Guidance
What is the maximum driving time a CMV driver of property may drive in the United States? FMCSA-BOR-HOS-395-FAQ005 Cross-border hours-of-service requirements
For drivers transporting property, are there differences between Canadian and U.S. HOS regulations for driving after on-duty time? FMCSA-BOR-HOS-395-FAQ008 Cross-border hours-of-service requirements
Medical Qualification FAQ – Waivers – Q4 FMCSA-BOR-MED-DRV-WAIVER-FAQ004 Medical qualifications requirement for foreign-domiciled motor carriers.
After FMCSA completes a PASA and the applicant has failed the PASA, what will happen next? FMCSA-BOR-MX LONG-HAUL-FAQ007 Mexico-domiciled motor carrier long haul operations
What is the difference between provisional operating authority registration and standard operating authority registration granted to Mexico-domiciled motor carriers to operate beyond the U.S.-Mexico border commercial zones and municipalities? FMCSA-BOR-MX LONG-HAUL-FAQ004 Mexico-domiciled motor carrier long haul operations
Medical Qualification FAQ – Waivers – Q3 FMCSA-BOR-MED-DRV-WAVIER-FAQ00Q3