I used to believe that traffic lights were linked by wires to a room at the nearest police station, with lots of switches that could change them from red to amber to green and so on.
I thought they were operated by a really old policeman who was too old to pound the beat any more.
A childhood belief about traffic lights

others believed things like this
- "Traffic lights are operated by monkies inside of them" or so a very reliable source informed me.— guuy
- I believed that traffic lights had police officers inside them, turning the lights on and off...— CrowHeart
- when i was little thought that ants changed traffic lights from green to red and vice versa.Anon
- My dad could change a traffic light from red to green using our garage door opener.Anon
- i used to believe that the green arrows on the traffic lights told you which way you had to go to get home.— Helen
- i used to believe that red yellow and green meant "ready, set, Go!" on traffic lights..— cabagona