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That is nuts!

The weirdest thing we have here (unrelated to roundabouts) is the hook turn which cars must obey at many intersections in the city:

When visitors were coming to the office in Swindon, I always gave them directions that took them thru the magic roundabout. Jolly good fun.

Cruel! (But quite funny)

...WTF.

The Wikipedia article doesn't even give any explanation as to why.

Why on earth did they build a circle of six roundabouts, rather than simply a single roundabout with six entrances/exits?

I'm baffled.

There was a big roundabout, but it couldn't handle the traffic volume.

You don't have to do a full loop if you need an adjacent exit. Eases load on the rest of entrances.

Ah, that makes sense. Thank you!