When you leave the motorway in the UK, there is a sign saying 'end of motorway regulations'. I used to think that regulations meant congratulations and that we were being congratulated for leaving the motorway!
A childhood belief about road signs

others believed things like this
- I used to believe that "the motorway" was one big long road that went absolutely anywhere in the world!!!Anon
- I thought for the longest time that a No Standing traffic sign meant no person should stand near that sign.— Shannon
- I thought that the sign "!" meant: "look at the wonderful landscape"— Giorgos
- my mom believed when she was little that a street sign that said don't walk meant you better run.— Sara Mclen
- I used to believe a dead end sign meant there was a graveyard at the end of the street or zombies — Still Out There
- I thought that the "don't walk" sign at crosswalks meant to run across the street as quickly as possible!— richard