Final answer:
Most vehicles will be swept off the roadway in only 12 inches of water. This fact underscores the potential danger of driving through flooded areas and the importance of adhering to road closures and safety warnings.
Step-by-step explanation:
The question relates to the depth of water required to sweep vehicles off the roadway. It is generally accepted that most vehicles can be swept away in only 12 inches of water. This may seem surprising, but vehicles can begin to lose contact with the road and float in relatively shallow water. This is particularly true for lighter vehicles, which can be moved by water as shallow as 12 inches. Trucks and SUVs may require more water depth to be washed away, but it is still essential for all drivers to be cautious when driving through flooded areas.
Additionally, just 6 inches of moving water can knock a person off their feet, which highlights the powerful and potentially dangerous force even shallow water can exert. Therefore, it's crucial to avoid driving through flooded areas and to observe any barriers or signs that indicate road closures due to flooding. Staying informed about weather conditions and road status is important for driver safety.