Driving on flooded roads is dangerous, and it doesn’t take much to make your car become unstable, lose traction or wash away. According to a float tank experiment using real vehicles at the University of NSW Water Research Laboratory, a small car can float in just 15 cm of water.
That’s the height of an average pen!
Reference: www.engineering.unsw.edu.au/news/unsw-engineers-demonstrate-the-dangers-of-floodwaters