Hazardous Materials Regulations FAQs
The hazardous materials regulations (HMR; 49 CFR Parts 171-180) provide requirements applicable to the commercial transportation of hazardous materials. Here you¿ll find some of the more frequently asked questions by topic area:
![[Header] PHMSA - U.S. Department of Transportation - Pipeline and Hazardous materials Safety Adminis](/staticfiles/PHMSA/SiteHeaders/Images/PHMSASiteHeader.gif)






