I'm from Israel, and in Hebrew the word 'traffic jam' is the same as a cork. And I always believed that traffic jams are caused because there's a cork in the middle of the street (like from a coke bottle) that somebody left and all the other cars are just trying to avoid
A childhood belief about cars

others believed things like this
- I used to belive that there was a god living in every traffic light, controlling the traffic!— Sukhi
- i used to beleive that a traffic jam was wen cars got stuck in jam!Anon
- For a very long time I believed that there were little men underground that changed the traffic lights!— Melissa
- I believed that traffic lights had police officers inside them, turning the lights on and off...— CrowHeart
- Used to believe that hitchhikers were directing traffic— Jer
- On motorways the person at the front of the traffic had set out
first— andy