Final answer:
Section 49 CFR 392.25 forbids the use of flame-producing emergency signals near certain hazardous materials on commercial vehicles, as they pose additional risks during emergencies. The NFPA 704 system aids in identifying these hazards to ensure safe handling and minimize risks.
Step-by-step explanation:
Section 49 CFR 392.25 of the United States Department of Transportation regulations specifies the prohibition of drivers of a commercial motor vehicle from placing emergency warning devices that produce a flame, such as flares or fuses, within 10 feet of a vehicle containing explosives, any cargo of flammable liquid or gas in bulk or in non-bulk packaging, or any Division 2.3 chlorine (a gas poisonous by inhalation) hazard. This provision is crucial for ensuring that no additional risks are introduced during an emergency situation, as these materials could react violently to an open flame.
The National Fire Protection Agency (NFPA) 704 Hazard Identification System provides critical information on the hazardous materials in question, including flammability, reactivity, and health risks, as well as specific handling instructions to prevent accidents. Safety around hazardous materials is paramount, and the strict adherence to these regulations helps maintain a safe environment for both the driver and the surrounding area, minimizing the risk of a catastrophic event when handling potentially explosive or flammable substances.