My dad always used to tell me that the small road humps on motorways coming up to a roundabout (UK) where for the benefit of blind drivers.
It took me 3 years to finally realise he was lying to me!
A childhood belief about in the street

others believed things like this
- I use to beleive that Motorways had special tarmac on the road that made the wheels go faster— Nada
- On motorways the person at the front of the traffic had set out
first— andy - I used to believe that there was special metal laid in the motorways that made the cars go faster!!— angela
- I used to believe that some day, they'd finally let the Coyote catch the Road Runner. I was so wrong. Le Sigh.— Givema Break
- I used to believe that if you crossed your fingers when you were lying, you weren't really lying.— jo
- As a small child I believed that the word was "nakeup", finally I found out that it was actually "makeup".— Hannnah P.