[OSM-talk] [Talk-us] Am I mapping this wrong, or should the router be fixed for this?

Richard ricoz.osm at gmail.com
Thu Jul 30 19:26:01 UTC 2015


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.
> 
> I do not understand why the osmand devleopers don't just implement this
> notion; it seems relatively obviously correct, and people who have
> modified their routing.xml files report reasonable results.

There is
 http://wiki.openstreetmap.org/wiki/Routing#Highway-type
clearly supporting this idea, however the details are probably very country
and situation specific so the concept may be of little help in practice.

Richard





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