alt Hacker NewsI almost like them, but my commute long ago involved one that revealed a frustrating pathological case. Constant traffic flow in one direction can make an entrance entirely unusable. It makes the average trip more efficient, but the worst case becomes dramatically worse.
>Constant traffic flow in one direction can make an entrance entirely unusable.
Seems like a poorly designed roundabout then. You should just pull into the roundabout, right after the car already in the roundabout passes by. Something is wrong if one direction of traffic can block the flow from other directions.