We have a bunch of roundabouts and traffic circles here in NJ. Today I learned that roundabouts and traffic circles are not necessarily the same thing.
http://en.wikipedia.org/wiki/Roundabout - no traffic signals controlling access to the roundabout - circling traffic in the roundabout has right of way http://en.wikipedia.org/wiki/Traffic_circle - access is controlled by traffic signals / stop signs - right of way can be assigned to circling or entering traffic (there is no set rule) Maybe an extreme example, this thing is not too far from where I live: http://www.openstreetmap.org/#map=18/40.57574/-74.62931 It has a name and some history: http://en.wikipedia.org/wiki/Somerville_Circle (It is currently tagged junction=roundabout in OSM.) On Jun 17, 2014, at 4:10 PM, Paul Johnson <ba...@ursamundi.org> wrote: > Not as rare as you think, and growing more common. I go through 2 or 3 > roundabouts regularly. The US official definitions defined in the MUTCD are > that roundabouts are uncontrolled or have yield signs entering, traffic > circles have stop signs. Neither are signal controlled in the MUTCD. We do > not have anything equivalent to the mini roundabout in the US (and likely > Canada, Puerto Rico, Guam, and the US Virgin Islands) at all, so > intersections tagged as such are probably wrong. > > On Jun 13, 2014 11:30 AM, "Clay Smalley" <claysmal...@gmail.com> wrote: > Coming from the US where any form of roundabout is rare, I would consider any > circular intersection a roundabout. Some have signals, some don't have > signals. I know that some people in the US distinguish between the two, where > a 'roundabout' has no signals and a 'traffic circle' does have signals. > Either way, it makes sense to me to tag it as a roundabout because: > > 1) it is a junction of multiple roads > 2) all traffic must enter a circular roadway, and then get off at some point > > Out of curiosity, what are others' criteria for a roundabout? > > > On Fri, Jun 13, 2014 at 8:54 AM, Fernando Trebien > <fernando.treb...@gmail.com> wrote: > Hello, > > I used to believe that, by definition, all roundabouts have free > transit and right of way along the circle, and that anything that > didn't display that property isn't a roundabout (just a circle). But > reading the wiki once again, I'm a little in doubt. The wiki mentions > that this is a roundabout, but I would previously have thought it > wasn't because of the traffic lights within it: > http://www.openstreetmap.org/#map=19/52.59689/-1.14146 > > So why is it a roundabout? Is it because of the circular shape? Or > could it be because it's impossible to infer that any of the entering > ways have right of way, since they are all controlled by traffic > lights? > > -- > Fernando Trebien > +55 (51) 9962-5409 > > "Nullius in verba." > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging
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