You are assuming that all dirt roads will be well-maintained, and that all dirt roads are in dry regions. Both assumptions are false. Most of the eastern half of the USA, and the Pacific Northwest of the USA, get plenty of rainfall, and even the dryer regions get some rainfall, some of it heavy enough to erode an unpaved roadway.
-------Original Email------- Subject :Re: [OSM-talk] question for folks working on routing engines >From :mailto:nro...@gmail.com Date :Fri Apr 15 09:53:24 America/Chicago 2011 Hello Richard, Gosmore looks at maxspeed and tracktype. I did not use surface, because I am under the impression that it is possible to drive fast on properly maintained dirt roads in dryer regions. Regards, Nic On Fri, Apr 15, 2011 at 4:36 PM, Richard Welty <rwe...@averillpark.net> wrote: > this occurred to me while surveying speed limits in a somewhat rural > part of the US. > > are any of the routing engines looking at the surface tag as part of > their decision making? > > i ask this because in NY, the default speed limit in rural areas is 55 > on all roads. there are numerous unpaved roads (dirt, gravel) which > do not have posted speed limits, but where driving at 55 is not > reasonable unless you're a rally driver and the road is closed. > > i want to tag these accurately, and am doing so, but i should think > that the routing engines ought to avoid, when possible, this combination > or others like it: > > highway=unclassified > name=Mead Road > maxspeed=55 mph > surface=dirt > > richard > > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk -- John F. Eldredge -- j...@jfeldredge.com "Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
