On Thu, 23 Jul 2009, Andy Allan wrote: > I disagree - I've come across town-centre one-way systems that are > smaller than some large out-of-town roundabouts. There is a clear > distinction between them in the way they are signed - e.g. using a > "roundabout ahead" warning triangle, so we should in fact record which > are roundabouts and which are just circular oneway streets, since they > are in fact different on the ground.
Ok, that's a fair point. Of course, all the warning signs should be on the map too :) (No, I'm not seriously expecting this to happen) I'm just trying to think what makes a roundabout a roundabout instead of just a one-way system. So far I've come up with: 1. It is one way in the appropriate direction (clockwise in the UK) 2. All the roads leave/join the outside of the loop (*) 3. It generally isn't very built-up in the middle (**) 4. It has a reasonably circular shape (***) 5. It is signposted as such Of course, there are sadly lots of exceptions... * Increasingly there are roundabouts with roads running through the middle: http://www.openstreetmap.org/?lat=52.936219&lon=-1.24996&zoom=18&layers=B000FTF The road through the middle is generally one-way though, and usually just one road. ** http://www.openstreetmap.org/?lat=50.910579&lon=-1.400756&zoom=18&layers=B000FTF (The Charlot Place roundabout in Southampton now has the reasonably tall Jury's Inn hotel in the middle of it - I'm sure people can think of many others) *** Can't think of any oddly shaped roundabouts off the top of my head, but I'm pretty certain that there are plenty. :) - Steve xmpp:st...@nexusuk.org sip:st...@nexusuk.org http://www.nexusuk.org/ Servatis a periculum, servatis a maleficum - Whisper, Evanescence _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
