If our US friends do also follow suit in adopting roundabouts widely, then I would advise them to try and avoid having too many in close proximity.
In the town of Swindon, 80 miles to the west of London, there is an egregious example of how a simple solution applied thoughtlessly can lead to a mess of complexity: the notorious Magic roundabout.
Although regularly featuring in lists of the worst examples of road design, it apparently has an excellent safety record because the traffic moves around it so cautiously.
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