[Tagging] RFC: pedestrian crossing as an area

[John Sturdy]

The micromapping is potentially useful to the blind, given suitable tools
for rendering it.  For example, where a wide road is crossed in two stages,
with an island between them, in the UK that island may have metal fences
around the edge of it, and the individual crossings staggered so that you
have to walk along the island to get from one to the other, thus stopping
blind people from walking all the way across in one go when they get the
audible/tactile indication from the pelican unit on the first stage of the
crossing.  It should be possible to render this non-visually from tags such
as footway=traffic_island.
(I am starting a project for rendering streets as text for screen readers;
it won't go as far as this, though, at least in what I am currently
planning.)
Mapping small features such as bollards individually could also be useful
for the blind; a blind friend pointed out to me that obstacles are also
landmarks, and counting bollards with the white cane to find a position on
the street could be useful.

__John
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