Practical maxspeed is useless as well. A straight wide road may be capable of hosting land speed records, but traffic density is likely to be a far more important factor.
On 30 July 2015 19:56:41 CEST, Richard <ricoz....@gmail.com> wrote: >On Thu, Jul 30, 2015 at 08:52:57AM -0400, Greg Troxel wrote: > >> The issue of on-ramps/off-ramps tagged as *_link has been a >particular >> discussion focus. The notion you expressed that these don't have >actual >> posted limits, just sometimes yellow signs is indeed shared by most >in >> the discussions. And we generally agree that the right speed to use >for >> them is more or less half the speed of the larger road from which the >> links go to/from. Perhaps half the speed of the actual road, perhaps >> half the speed of a nominal road of that class, and perhaps slower. >> But these are fine details, and the consensus is pretty strong. > >if there is no hard limit this might help: > http://wiki.openstreetmap.org/wiki/Key:maxspeed:practical > >another thing that could help - routers should add a cost for every >lane switch or changing to different road, likewise every implicit or >explicit yield which would be implied here. >However this has the problem that sometimes what looks as different >road in OSM data is a road that was split for some technical reason. > >Richard > >_______________________________________________ >talk mailing list >talk@openstreetmap.org >https://lists.openstreetmap.org/listinfo/talk
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