Re:Magic Roundabout (Swindon)
by mcv on Thursday January 23, 2020 @09:33AM
(#22127821)
Isn't a two-lane roundabout one that simply has two lanes going round? The thing about the turbo-roundabout is that there are actually no lanes going round. Each lane just takes you to your exit. There's no option to stay on the roundabout at that point: you're forced off. It's very restrictive in that sense, but that also means that traffic flows smoothly: other drivers also have no option to merge wrong or try anything weird.
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> other drivers also have no option to merge wrong or try anything weird
If they're following the markings, yes. We have a 1.5-lane roundabout in my area[1] (two lanes on the north side of the circle, one lane on the south side) fed on the southwest by a two-lane road; the right lane is supposed to be a bypass for vehicles turning right, and does not actually enter the roundabout. Some vehicles still make the attempt, ignoring road markings, adjacent vehicles legally entering the roundabout from the left lane, and even the impending concrete barrier.
[1] https://www.google.com/maps/@42.0332849,-91.6029348,100m/dat...
Re:Magic Roundabout (Swindon)
by bobthepanda on Thursday January 23, 2020 @01:14PM
(#22130046)
In turbo roundabouts, the markings are usually delineated by raised curbs.
The one you linked should've physically separated the right turn lane from the rest of the roundabout if that was the intention. You don't need all that much curb to do it.