How an Insane 7-Circle Roundabout Actually Works

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Your first thought upon seeing Swindon’s ‘magic roundabout’ might be: man, the Brits have really lost the plot lately. But this thing—which is actually seven roundabouts in one has been working for 60 years.

The roundabout was constructed according to the design of Frank Blackmore, of the British Transport and Road Research Laboratory.Traffic flow around the larger, inner roundabout is anticlockwise, and traffic flows in the usual clockwise manner around the five mini-roundabouts and the outer loop.

When the roundabout complex was first opened, the mini-roundabouts were not permanently marked out and could be reconfigured while the layout was fine tuned

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A police officer was stationed at each mini roundabout during this pilot phase to oversee how drivers coped with the unique arrangement.

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