[OSM-newbies] motorway _link and _junction tagging

[Phil! Gold]

I'm looking to see how other people approach tagging name= and ref= for
motorway_links and motorway_junctions.

The wiki says to put the exit number in the ref= for a motorway_junction,
and use the text on the exit's signs for the motorway_junction's name=.
That's easy enough to do, but what about places where there's one exit
that branches again after departing from the motorway?  Those often have
separate signs (e.g. the left might be signed "<route> South; Town A" and
the right might be "<route> North; Town B").  It would be nice,
particularly for routing applications, to have that data represented
somewhere, but I don't see a good place to put it.

Similarly, I know of a few places where one freeway ends but feeds
directly into another one via ramps.  Not only might that not have an exit
number, but there's no way to associate the different directions it goes
with each branch, aside from using the motorway_link's name= identically
to the motorway_junction's.  If I do that, it might make sense to put the
exit number in the motorway_link's ref=, but I've seen at least one place
on the wiki that suggests using the ref= for the road that the _link goes
to.

Have these considerations come up before?  What conclusions, if any, have
been reached about this in the past?  Should I be asking this on talk (or
talk-us, since I'm in the US and different regions might have different
customs)?

As always, I strive for maximum compatibility with the rest of the map
editors.

-- 
...computer contrarian of the first order... / http://aperiodic.net/phil/
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