Developed jointly by the governments of Canada, the U.S. and Mexico for use by fire fighters, police, and other emergency services personnel who may be the first to arrive at the scene of a transportation incident involving dangerous goods. It is primarily a guide to aid first responders in quickly identifying the specific or generic hazards of the material(s) involved in the incident, and protecting themselves and the general public during the initial response phase of the incident. It is not intended to provide information on the physical or chemical properties of dangerous goods. Comprehensive!