How do traffic lights know when to change? — Part 1: How do traffic lights know when to change? — Part 1: Foundations
Section 1 of 6
What Is This Really About?
Traffic lights are those colorful signals that help cars, bicycles, and people move safely at intersections. But how do they know when to change from green to yellow, or yellow to red? Think of a traffic light like a teacher in a classroom, guiding everyone on when it's time to move or stop.
Every day, traffic lights make our roads safer and our commutes smoother. They help keep traffic moving in an orderly way, a bit like how a conductor leads an orchestra so that every instrument plays at the right time.
Visualize: Imagine you're standing at a busy intersection. What might happen if there were no traffic lights?