I used to believe that the sign "To let" was to tell us there was a toilet there, but many had forgotten to put the "i" in the word.
Also, teh sign "police slow down" was actually meant "please slow down"
A childhood belief about road signs

others believed things like this
- When I used to see the sign 'police accident' I thought it meant that a police car had crashed.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