How deep of fast-moving water can sweep away a car?

Fast-moving water can exert significant force, making it dangerous for vehicles. A depth of 1 foot of rushing water is enough to lift most cars off the ground and cause them to be swept away. This occurs because the buoyancy effect of water reduces the vehicle's traction and stability. It is important to be aware that while 6 inches may flood a car's brakes, and deeper water at 2 feet can easily move a vehicle, the threshold for actually sweeping a vehicle away is generally recognized at around 1 foot.

The danger of water at this depth is compounded when it is flowing rapidly, as fast-moving water can create a powerful current. Drivers should always exercise extreme caution and avoid driving through water whenever possible, especially when the depth is uncertain or the current appears strong. This understanding emphasizes why 1 foot is recognized as the critical depth for potential vehicle displacement.