Why should a driver avoid driving through deep water or flooded roads with a placarded hazmat load if at all possible?
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Correct answer to question 89 (Hazardous Materials): Flooding can affect the vehicle's stability and, if it stalls, leave a hazardous load stranded in a hard-to-secure location
Why
A stalled vehicle in floodwater is hard to secure and reach quickly, which is a much bigger problem when that vehicle is also carrying a hazardous load that needs careful handling.
Updated: November 2026