[OSM-talk] Should Bridges be independent of their ways?

[Anthony]

On Sun, Sep 20, 2009 at 9:10 AM, John Smith <deltafoxtrot256 at gmail.com>wrote:

> 2009/9/20 Anthony <osm at inbox.org>:
>
> > In most cases I don't think a relation is the only solution either.  I
> don't
> > see it as an abuse, though.  It is clearly being used to show a relation
>
> Lanes aren't physically seperated
>

Yes they are.  If they weren't physically separated, people would be driving
on top of each other.  If they weren't physically separated, they wouldn't
be called multiple lanes - they'd be called one lane.

> As long as you only suggest tagging subsections of a way in those limited
> > cases where there is no routing information conveyed, I don't really care
> > how you implement it.
>
> > If there are 2 lanes going in the same direction, with maxspeeds 130 and
> > 110, the maxspeed in that direction is 130.  The fact that you have to be
> in
> > a particular lane to travel at that speed is irrelevant to routing
> software
> > so long as you can change lanes freely.
>
> I disagree, you should be able to tag each lane with the right speed,
> otherwise you aren't accurately tagging things.
>

The maxspeed of a way is the maximum speed you can legally travel on that
way.  There's nothing inaccurate about tagging the way with the maximum
speed you can legally travel on it.


> > To wit, this thread started with someone talking about "a cycle lane,
> dual
> > carriage way (with central reservtion) & footpath".  Are you suggesting
> that
> > this should be represented as *a single way*?  If so, I have to
> vehemently
> > disagree.  If not, then tagging subsections of a single way has nothing
> to
> > do with the thread, and is off-topic.
>
> If it's a single physical section, ie a bridge with all the lanes
> physically connected then it should only be one way and we should be
> able to tag the individual lanes.
>

Everything in the world is physically connected.  In this case, let's leave
out the cycle lane and footpath and just consider a dual carriage way (with
central reservation).  There are two roads and an island which go over one
bridge.  One way, two, or three?

One way is unacceptable.  If that's your proposal, it is to rewrite all the
editors and all the routing software, and then go through the database
combining all the dual carriageways which many of us worked hard to split up
in the first place.
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