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

[Colin Smale]

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.osm at 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
>
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