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This is basically two normal roundabouts, one inside the other, with traffic direction the opposite way in the inner lane. Or a two-lane roundabout. It allows y
by Jabbles 14y ago
This is basically two normal roundabouts, one inside the other, with traffic direction the opposite way in the inner lane. Or a two-lane roundabout. It allows you to spend less time on the roundabout if you want to take the junction to your right, as you would usually have to go to your left and do an almost complete lap.
Compare reaching your parent on a singly-linked list to a doubly-linked list. Being able to traverse in either direction may provide significant performance boosts...
- ZeroGravitas 14y agoGoing by the diagram, I think it makes more sense to think of it as 6 roundabouts in a circle. The inner "reverse roundabout" is just you entering and leaving each roundabout by the first exit in turn. The "outer roundabout" is similarly you entering and leaving via the second exit of each roundabout. Neither of those is a true roundabout as you don't have right of way once you're on it.
- dllthomas 14y agoIn terms of driving, the five-roundabout perspective makes more sense (for reasons of right-of-way, as you say). In terms of algorithmic complexity, if we are considering distance traveled by the average vehicle, the two-nested-roundabouts perspective makes more sense.
- davidarkemp2 14y agoIncidentally, most of the traffic comes from Queen's Drive, Drove Road, and Fleming Way (Shrivenham road has been closed to through traffic for many years). Having ridden across it on a bicycle regularly as a teenager, it works surprisingly well.
- ivix 14y agoYes, it's just a circular road which happens to have lots of roundabouts on it.