On Sun, 19 May 2019 at 18:32, <osm.tagg...@thorsten.engler.id.au> wrote:
>
> Personally, I can not remember having ever seen, in my whole life, a signal
> controlled pedestrian crossing that does not have road markings, excluding
> cases where there are temporarily no road markings at all because they
> haven't been painted yet after the road has just been laid down or resurfaced.
>
> [...]
>
> crossing=uncontrolled and crossing=zebra have been used a combined 1.25
> million times. In practical usage, they mean exactly the same thing, and they
> have widespread software support already. Trying to replace them with a 3rd
> value that still means exactly the same things is a classical case of
> https://xkcd.com/927/
While it may be true that there aren't any signal controlled
pedestrian crossing without road markings, the problem with
zebra/marked using the same key as traffic_signals is that mappers
(those that don't visit the place, don't have local knowledge and
likely haven't read the documentation) see a marked crossing on the
aerial imagery and tag it crossing=zebra/marked even if there are
traffic lights -- sometimes they even retag a crossing=traffic_signals
to crossing=zebra/marked. I've already corrected dozens of them, but
there are constantly new ones being wrongly added or retagged. While
crossing=unmarked/{uncontrolled|zebra|marked}/traffic_signals
theoretically may work, it doesn't in practice. I think that only
moving traffic lights and road markings to separate keys will solve
this problem.
Regards
Markus
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