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A childhood belief about traffic lights

When I was young I used to believe that "traffic light changer" was an actual occupation, and it involved sitting in a little office underground at an intersection, with something like a submarine telescope which stuck out of the ground above you so you could watch the traffic and know when to switch the light from red to green.
A few years went by, and I explained my theory to my dad, who then proceeded to enlighten me, that they actually worked by laser beams that shoot lasers down the road that count how many cars are there wating, so they know how long to hold the lights for.
Thanks dad.

— Courtney

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