I grew up in a mountainous region of Kentucky. In many places, the road cuts through the hills and rocks will fall off of the cliffs on to the road. There are signs that read "Fallen Rock Zone." My Papaw had a story he would tell me about an Indian cheif who was looking for his missing daughter. Her name was Fallen Rock and when you went into a Fallen Rock zone, you were supposed to keep an eye out for her. I would scan the area for her every time I saw one of those signs. According to my friends, I am not the only child who was told this. Maybe it is a Kentucky thing...
A childhood belief about road signs

others believed things like this
- I used to look for an Indian along the roadside because of signs that stated
"watch for fallen rock"— pam petry - I thought a "fallen soldier" was one who'd tripped and fallen during a battle.Anon
- My friends and I used to believe that if you planted a rock, it would grow a rock tree. Anon
- I used to think that oil drops on wet road were rainbows drops that have fallen to earth Anon
- I used to beleive that road signs grew out of the ground.— Tiana
- I used to believe the the Elton John song, "Crocodile Rock" was about a Crocodile, named Rock.Anon