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DOT/PHMSA RIN: 2137-AF65 Publication ID: Fall 2023 
Title: ●Hazardous Materials: Enhancing Safety for High-Hazard Trains (HHTs) 

The Federal hazardous materials transportation law authorizes the Secretary of Transportation to prescribe regulations for the safe transportation, including security, of hazardous materials in intrastate, interstate, and foreign commerce (49 U.S.C. 5103(b)). In this rulemaking, PHMSA will amend the Hazardous Materials Regulations to implement regulatory requirements and operational controls on a larger set of newly-designated High-Hazard Trains thus ensuring more stringent standards for more classes of hazardous materials than railroads currently follow.

Agency: Department of Transportation(DOT)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: No 
CFR Citation: 49 CFR 172    49 CFR 174   
Legal Authority: 49 U.S.C. 5101 et seq.    49 U.S.C. 5103(b)   
Legal Deadline:  None
Action Date FR Cite
NPRM  10/00/2024 
Additional Information: PHMSA-2023-xxxx (HM-251G)
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Alexander Wolcott
Transportation Regulations Specialist
Department of Transportation
Pipeline and Hazardous Materials Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 366-8553