Data / Federal rules / 2025-21970
Hazardous Materials: Modernizing Regulations To Facilitate Transportation of Hazardous Materials Using Highly Automated Transportation Systems
The Pipeline and Hazardous Materials Safety Administration published this proposed rule in the Federal Register on December 4, 2025. Comments closed on March 4, 2026.
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What the agency says
The Pipeline and Hazardous Materials Safety Administration (PHMSA) is publishing this advance notice of proposed rulemaking (ANPRM) to obtain stakeholder input on potential revisions to the Hazardous Materials Regulations (HMR) to facilitate the safe transportation of hazardous materials using highly automated transportation systems.
Key facts
- Document number
- 2025-21970
- Type
- Proposed rule
- Action
- Advance notice of proposed rulemaking (ANPRM)
- Agency
- Transportation Department; Pipeline and Hazardous Materials Safety Administration
- Published
- December 4, 2025
- Comments due
- March 4, 2026
- Dates
- Comments must be received by March 4, 2026, to ensure consideration. However, PHMSA will consider late-filed comments to the extent possible.
- Docket
- Docket No. PHMSA-2024-0064 (HM-266)
- Regulation ID (RIN)
- 2137-AF68
- Code of Federal Regulations
- 49 CFR 171; 49 CFR 172; 49 CFR 173; 49 CFR 174; 49 CFR 175; 49 CFR 176; 49 CFR 177; 49 CFR 178
- Pages
- 9
Other documents from the Pipeline and Hazardous Materials Safety Administration
| Document | Type | Published |
|---|---|---|
| Hazardous Materials: Incorporation of ASME Code Section XII and the National Board Inspection Code 2026-19741 | Final rule | Sep 28 |
| Hazardous Materials: Allowing Fireworks Certification Agencies (FCAs) To Approve Professional Fireworks 2026-16111 | Final rule | Aug 7 |
| Hazardous Materials: Reducing Burdens on Domestic Companies Using Battery-Powered Equipment in Trades 2026-15823 | Final rule | Aug 4 |
| Hazardous Materials: Adoption of Department of Transportation Special Permit 21478 2026-15820 | Final rule | Aug 4 |
| Hazardous Materials: Adoption of Department of Transportation Special Permit 14175 2026-15819 | Final rule | Aug 4 |
| Hazardous Materials: Adoption of Department of Transportation Special Permit 21379 2026-15818 | Final rule | Aug 4 |
| Hazardous Materials: Adoption of Department of Transportation Special Permit 21287 2026-15817 | Final rule | Aug 4 |
| Hazardous Materials: Adoption of Department of Transportation Special Permits 12412 and 11646 Into the Hazardous Materials Regulations 2026-15816 | Final rule | Aug 4 |
Everything from the Pipeline and Hazardous Materials Safety Administration · Published in December 2025
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.