A friend of mine actually believed this story that her dad told her. They were driving one day and she asked her dad what the bumps were in the middle of the road (road reflectors). He told her that it was brail so that blind people can drive.
A childhood belief about cars

others believed things like this
- I used to believe that the cats eyes in the road...reflectors...were the eyeballs from real cats.— Liza P.
- I thought you were supposed to drive down the center of the road.— Cassiopeia
- When my wife was a kid, she used to think that highway speed bumps were for the blind.Anon
- I used to think the reflectors in the middle of roads were pieces of cheese!Anon
- I once told a friend of mine that if you held in a smelly burp, it'd turn into a fart. She believed me.Anon
- My older brother told me that speed bumps were really dead people covered in cement.— Trina