UN Recommendations

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International Program Overview

PHMSA's International Program provides leadership in the development of international hazardous materials transportation safety standards. The program draws on PHMSA's technical expertise, stakeholder participation, and multi-modal collaboration to support the...

Hazardous Materials Petitions

The table below lists open petitions for rulemaking that PHMSA has received requesting amendments to the Hazardous Materials Regulations (49 CFR Parts 171-180). The Petition Number (e.g., P-0001), the Docket ID, and the Name of Petitioner are listed, and the links...

Hazardous Materials Regulations

PHMSA is responsible for regulating and ensuring the safe and secure movement of hazardous materials to industry and consumers by all modes of transportation, including pipelines. To minimize threats to life, property or the environment due to hazardous materials related incidents, PHMSA's...

Hazardous Materials Rulemakings Overview

The PHMSA Office of Hazardous Materials Safety periodically issues rulemaking documents that propose or adopt changes to the regulations. You may participate in the rulemaking process by filing written comments on any rulemaking document that asks for comments, participate in a...

PHMSA's Online CFR (oCFR)

The oCFR tool is an interactive web-based application that allows users to navigate with a single click between all content connected to a HMR citation. The oCFR includes tools to sort, filter, and export search results. Besides providing the regulated community with a new way to...

oCFR Quick Reference Guide

Hazardous Materials Regulations Map

Hazardous Materials Standards and Rulemaking Overview

The Standards and Rulemaking Division is located in Washington, DC and led by the Division Director. The Division is responsible for all aspects of rulemakings, letters of interpretation and controlled correspondence, petitions for rulemaking, NTSB...

Preemption Determinations

Sections 5125(a) and (b) of 49 U.S.C. provide that, in the absence of a waiver of preemption by the Department or specific authority in another Federal law, a requirement of a State, political subdivision of a State, or Indian tribe can be preempted.

Subject Index of Preemption...