I was almost an adult before I realized the reason that almost all US cities have an "Access Road", or a "Frontage Road' in them, and they seem to be very long, and meander all over the place.
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 used to believe the "Yield" from the road sign was somebody's name.— julia
- I used to call the shoulder of the road, the elbow.Anon
- My mum used to tell me that someone was delivering bricks at the top of our road when it thundered!— Deb
- I used to think that if you went to the end of a road marked "Dead End", somebody would try to kill you.— Spooky
- I used to believe that cats eyes were lit up by a man running under the road with a torch— Martin