When operating a New Energy (EV) electric taxi through flooded urban underpasses or deep standing water, what is the critical safety threshold regarding water depth?

1. Electric vehicles can safely drive fully submerged underwater without restrictions
2. Do not drive through standing water if the water level exceeds half the wheel height (or reaches the lower edge of the high-voltage battery pack chassis)
3. Drive through as fast as possible to create a bow wave
4. Shut off all headlights to protect the high-voltage electrical circuits