[Tagging] I can't support transit:lanes

Simon Poole simon at poole.ch
Mon Jun 11 08:43:07 UTC 2018

Just as Bryan does, I can see supporting special casing transit
relations (as we already have to do the same for turn restrictions). I
am -very- reluctant to support one-off tag semantics that require
special code to handle them.

Note with respect to the parallel discussion on tagging systematics,
this kind of thing is multiple orders of magnitude worse than
inconsistencies in tag naming and so on (which at least from an editor
pov can typically handled by configuration in a preset).


Am 11.06.2018 um 06:42 schrieb Bryan Housel:
> I’ve had a few recent conversations about this proposal:
>  https://wiki.openstreetmap.org/wiki/Proposed_features/transit
> Unfortunately I can’t support it.
> Not only is the name bad (it should be named `transition:lanes` but
> whatever), the bigger problem is that, as proposed, the tag can be
> placed on either a way or a relation.
> The problem with tagging these on ways is that/if you split the way,
> the tag breaks/.  
> No other tag works this way (except maybe for address interpolation
> lines, but presumably anybody splitting one of those would know that
> they need to adjust the numbers on the endpoints).  
> I’m not going to add a special rule in iD to warn people if they are
> splitting a way with a lane transition tag.  I don’t want to speak for
> the JOSM devs, but I doubt they would implement something like this
> either.
> The only way I’ll be able to support lane transitions would be as a
> relation that has similar semantics to turn restrictions..
> from/via/to.  Keep it simple (no multi via ways please).  This is
> already an understood way of tagging things that connect 2 ways.
>  (could you imagine if we tagged turn restrictions as
>  maybe-a-relation or maybe-a-way-tag ?? nope!)
> I notice that `transit:lanes` has already been tagged on around 4000
> or so ways, so I thought it would be worth pointing out that the
> proposal is Dead on Arrival in it’s current state.  We should rework
> it before people tag too many more of these and end up disappointed.
> thanks, Bryan
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> Tagging at openstreetmap.org
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