Final answer:
A placarded vehicle cannot drive near an open fire unless it can pass safely without stopping. This safety measure helps prevent the risk of hazardous materials catching fire.
Step-by-step explanation:
The question regarding a placarded vehicle's ability to drive near an open fire pertains to safety regulations associated with the transportation of hazardous materials. According to safety guidelines, a placarded vehicle cannot drive near an open fire unless it can pass safely without stopping. This rule is in place to prevent the risk of hazardous materials igniting due to proximity to an open flame. It emphasizes the importance of keeping moving and not becoming stationary in the vicinity of a fire, to reduce the possibility of an accident or incident arising from the transportation of dangerous goods.