Traffic Lights Need a Fourth Color, Study Says: Here's Why

A study proves stoplights need a fourth color: white. Here’s what it signals—and why it makes a ton of sense.

How it Works: What Sits on a Traffic Light? - LYT

Red Light Images – Browse 7,454,526 Stock Photos, Vectors, and

Why thousands of city street lights are turning purple

Traffic Light On Street With Red Signal Lit Up Stock Photo, red

How a Fourth Traffic Light Color Could Make Self-Driving Cars a

How a Fourth Traffic Light Color Could Make Self-Driving Cars a

Red light, white light? Scientists suggest adding 4th color to

Traffic lights in Australia