Yellow doesn’t meant “slow”, it means “stop if you still reasonably can, otherwise go”

Sure, a lot of drivers interpret that as “go fast before it turns red”. But “slow”? That doesn’t make any sense

Why is green on top?

Here

-GREEN: GO

-YELLOW: GO faster, but immediately hit the brakes hard as you can, if you get a feeling you don’t make it.

-RED: Take a nap. After it turns green, be so late that only few cars manage to leave.

India:

Green- Go

Yellow- Go

Red- Go

In Morocco most people stop at red but then they’ll drive down the wrong side of the road to jump the queue and put themselves so far over the line they can’t even see when the lights change.