Intersections are emotional infrastructure. Some cultures treat roundabouts like calm rotating parlors; others treat them like a dare. Signal timing, pedestrian countdowns, and camera enforcement all reflect jurisdiction, sometimes down to the city.
When a roundabout deceives you
France loves them; parts of the US barely believe in them. But a British residential roundabout and a Portuguese urban one do not feel identical if you watch merging body language. Use horn frequency as a last resort; it is emotional data and noisy.
Play lesson: intersection photos are not travel brochures
If you memorize ‘roundabout equals Europe,’ you will lose in Australia. Build conditional rules: roundabout plus driving side plus vegetation. Geography is combinatorics, not bingo.