49 CFR

U.S. regulations - Full text electronic version of Title 49 of the Code of Federal Regulations

49 CFR DOT Chart 17

Markings, Labeling, and Placarding Guide

49 CFR Guidance

How to Use the Hazardous Materials Regulations

ADG Edition 7.7

Australian Code for the Transport of Dangerous Goods by Road & Rail

ADR full text

Official Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR) from the UN website

ADR Instructions in Writing

Linguistic versions of ADR written instructions for drivers on what to do in the event of an accident or emergency

ADR Tool

ADR Tool for route planning and placarding job aid


Frequently Asked Questions compiled and grouped by topic.

PHMSA Interpretations Browser

List of the sections that have interpretations available for the selected category

TDGR Placard Flow Chart

Transport Canada Placarding Guidance and Flow Chart

US National Hazardous Materials Route Registry

U.S. list of Designated, Preferred and Restricted Routes