Not buses. It's a train I think. It's more modern writing, and below the train I believe it says "LE Train". It also looks as though it supposed to say F*** you. :(

If you are scratching on a wall, you may not be so concerned about proper grammar, but more about conveying the message quickly to all nationalities.

But could it not be just a message to any that came after? As in "Hitler is broken" "done for" or "dead".