An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
1-800-HMR-49221-800-467-4922202-366-4488infocntr@dot.gov
Have a question about transporting hazardous materials? Need clarification on an entry in the Hazardous Materials Regulations? PHMSA's Hazmat Information Center provides live, one-on-one assistance Monday through Friday from 9 a.m...
PHMSA engages in bi-lateral dialogues with many countries as part of harmonizing the U.S. Hazardous Materials Regulations (HMR) with international standards and regulations. Currently, our main country partnerships are with Canada, China, and...
ADR and RID is the Agreements Concerning the International Carriage of Dangerous Goods by Rail (RID) and by Road (ADR) and the Joint meeting of RID Safety Committee and the Working Party on the Transport of Dangerous Goods (WP.15).
The RID Safety Committee and WP.15 administer...
The International Atomic Energy Agency (IAEA) first published its regulations for the safe transport of radioactive material in 1961. These regulations are reviewed and updated regularly, and then passed to the UN Sub-Committee of Experts on the Transport of Dangerous Goods for incorporation...
The International Maritime Organization (IMO) is responsible for maintaining and updating the International Maritime Dangerous Goods Code (IMDG Code) which governs the vast majority of maritime hazardous materials shipments. The IMDG Code is intended to provide for the safe transportation of...