[Tagging] "Unambiguous crossings" proposals and related questions

[Markus]

Hi Nick, hi everyone,

I welcome these proposals (crossing=marked, crossing:signals=* and
footway=island) [1] to bring order to the pedestrian crossing tagging.
Thank you, Nick, for your efforts so far!

I have two questions, not about the proposals themselves, but about
pedestrian crossing tagging in general:

  * When the crossing type is tagged on the way (e.g. highway=footway
+ footway=crossing + crossing=marked + crossing:signals=yes), should
the crossing type also be tagged (duplicated) on the crossing node or
are routers able to get that information from the crossing ways?

  * Should the road be split for short refuge islands into two one-way
ways? This would result in unusual maps, especially at crossroads
(example: [2]).

[1]: https://wiki.openstreetmap.org/wiki/Proposed_features/Unambiguous_crossings
[2]: https://wiki.openstreetmap.org/wiki/File:Crossroads_with_traffic_islands.png

Regards

Markus