Back when I actually worked for a living I used to drive a truck and bulldozer. A small one. 15 ton. It was great fun. But out on the roads I had to be careful to not take out low-hanging train bridges. They were usually marked like this one but many times the distances were wrong. I almost ran into a few on occasion. But that was in New York where there was plenty of space. I could never run a construction business in Japan. Would never fit under the bridges even without the Cat.