DOT Hotline

Have a question about transporting hazardous materials? Need clarification on an entry in the Hazardous Materials Regulations or help with the use of the regulations? The Pipeline and Hazardous Material Safety Association (PHMSA) Hazmat Information Center provides live, one-on-one assistance Monday through Friday from 9 a.m. – 5 p.m.

DOT Hotline Contact Information:
1-800-HMR-4922
1-800-467-4922
202-366-4488
phmsa.hm-infocenter@dot.gov