What is the minimum distance required from bridges, tunnels, or buildings when carrying Division 1.2 or 1.3 materials?

The minimum distance required from bridges, tunnels, or buildings when carrying Division 1.2 or 1.3 materials is 300 feet. This distance is established to ensure safety in case of an incident involving these types of hazardous materials, which are classified as explosives and can pose a significant risk of fire or blast hazard. The spacing is meant to protect structures and people from potential damage or harm resulting from an explosion. Adhering to this guideline helps to mitigate the risks associated with the transportation of these dangerous materials, ensuring that safety protocols are followed during transit.