[OSM-talk] How to tag lanes, not ways, was: Deprecating the use of Tag:highway=stop in favour of Key:stop

[Anthony]

On Sun, Aug 30, 2009 at 1:22 PM, John Smith <deltafoxtrot256 at gmail.com>wrote:

> 2009/8/31 Anthony <osm at inbox.org>:
>
> > Right, and at an intersection which has a turning lane, there is a
> > restriction on a per-lane basis.  You can only turn left from the turning
> > lane - you can only go straight (or possibly right) from the other lanes.
> >  So do you propose splitting the way at every turning lane?
>
> How would using relations solve this either?


I never suggested using relations to "solve" it.  I don't think it needs
solving.  You cross the roads at a 90 degree angle and ignore the turning
lane.  People know you have to get into the left hand turning lane to make a
left hand turn (a jughandle would look altogether different as the jughandle
itself would constitute a new way).

Right now turning restrictions already require a relation, though this
relation could actually be avoided if you allowed "lane" to be a "way"
(you'd simply have nodes for the lanes that connect and no nodes for the
lanes that don't connect).  Each lane would already be one-way unless you're
talking about a road where both directions share the same lane.

> I guess for the most part we don't.  We could just split the way up into
> > multiple lanes as necessary and then merge them back together.  Still no
> > need for an extra table or children, though.
>
> I guess we have to agree to disagree then, you seem to be trying to
> fit things into the existing frame work for the sake of it and it's an
> ugly hack.
>

I guess we will have to agree to disagree, but it'd be nice if you'd answer
my questions about how to do all those things I asked about.
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