[OSM-talk] routing - US interstate type junction -Wichita, KS

[David Lynch]

On Tue, Sep 22, 2009 at 16:55, Mike N. <niceman at att.net> wrote:
>
>>  The problem connector is also named US81...etc, as well as containing the
>> routing relation 135 South.   I believe that is what disrupted the
>> routing.
>
>  A further clarification - the connection from 81 to 254 would be a
> secondary_link , since the road to which it connects is secondary.    If it
> connected with another motorway, the connecting road would be a
> motorway_link.

Actually, I'd say that the most common method (and what it sounds like
the map features page on the wiki says) is to tag the "higher" of the
two road classes for *_link, rather than the class of the road being
connected to. So the correct tag would be motorway_link when leaving
or joining a motorway regardless of the class of the other road,
trunk_link if one road is a trunk and the other is anything other than
motorway, and so on.

It also looks like, from what I can see on aerial photos, the
highway=motorway designation could apply further east for another
couple miles, but I'll let someone with local knowledge make the
decision there.

-- 
David J. Lynch
djlynch at gmail.com