They'll sometimes design that pattern in with "dogbone" style roundabouts where there's a median between the two sides of the street, a roundabout at each end,

They'll sometimes design that pattern in with "dogbone" style roundabouts where there's a median between the two sides of the street, a roundabout at each end, and you HAVE to go one-way down one side and around the roundabout to turn around. It's quite annoying but probably saves lives.