Traffic lights originally used white for 'go' and red for 'stop' but when the red colored lenses fell out, the now-white lights caused a few high-profile traffic accidents.
Trivia.com
Definition.com
The Traffic light is a metaphor for the periodic stops and starts along the highway of our ambitions.
Dad Joke.com
Why did the traffic light turn red?You would too if you had to change in the middle of the street
Definition.com
A Traffic light is an apparatus that automatically turns red when your car approaches.
Meme.com

Trivia.com
The traffic light was first in use in London in 1868, before the advent of cars.
One-Liner.com
They really ought to make all traffic lights green on St. Patrick's day.
Dad Joke.com
What did the traffic light say to the cars?Don't look, I'm changing
Definition.com
A Traffic light is a device that gives pedestrians so much confidence that they never see who or what hits them.
Trivia.com
Cleveland is home to the first electric traffic lights