A wall is a safety device used to prevent vehicles from crashing into buildings or people. It is usually made of reinforced concrete or metal materials with high strength and impact resistance. Anti-impact walls can be set in public places, commercial areas, airports, stations and other places to protect personal safety and property safety. It can reduce the damage and loss caused by collision accidents, improve the level of traffic safety, and ensure social order and public safety.
It's just to keep the rain out. Keep the rain out
A vertical wall placed at the base of a dam or at the head of the upstream fender and at the end of the fender to prevent water from scouring.