Japan puts tall fences around highways. I've assumed that's for the noise but never checked. Example: https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.we

Japan puts tall fences around highways. I've assumed that's for the noise but never checked. Example: https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.webcartop.jp%2Fwp-content%2Fuploads%2F2023%2F02%2FO-uchi_Highway-Wall-_002.jpg&tbnid=JgTz9BFT4JUlNM&vet=12ahUKEwiRz8mNp96DAxX1OkQIHZ0GC4YQMygOegQIARBu..i&imgrefurl=https%3A%2F%2Fwww.webcartop.jp%2F2023%2F02%2F1056708%2F&docid=OEkURSrdu6S8dM&w=1500&h=1000&q=%E6%97%A5%E6%9C%AC%E3%81%AE%E9%AB%98%E9%80%9F%E9%81%93%E8%B7%AF%E3%81%AE%E5%A3%81&ved=2ahUKEwiRz8mNp96DAxX1OkQIHZ0GC4YQMygOegQIARBu https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.webca...