The Mezzanine

We don't have the orange lights or the lockers in America, either. Our traffic lights have five settings:
Green. Go.
Yellow. If you're already in the intersection keep going. If you can avoid getting into it, do so.
Red. Don't go.
Flashing yellow. The control system for the lights at this intersection is busted; pay attention to the other cars and drive carefully.
Flashing red. The control system for the lights at this intersection is busted; pay attention to the other cars, drive carefully, and people going the other way (who have a flashing yellow light) have the right of way over you if it's otherwise unclear who should go.