[Accessibility] Mapping “turning nodules” in pedestrian crossings

[Martin BODIN]

Hi,
I currently live in London where there is a lot of pedestrian crossing with
a special nodule / button hidden below a lot pedestrian crossing boxes. I
would like to know how to map them well in OSM.
These nodules are shown in this video:
https://www.youtube.com/watch?v=fRPWlBAgSnw They are small buttons hidden
below the box with the button to call the traffic lights. These nodules
turn when it is safe to cross the road.
The closest tag to it might be the vibration key:
https://wiki.openstreetmap.org/wiki/Key:traffic_signals:vibration However,
the word “vibration” technically describes something different (this nodule
turns but does not vibrate, and it is positionated in a very specific
location below). I thus fear that the “vibration” tag might be misleading,
leading to people waiting with the hand on top of the box expecting it to
vibrate in some ways instead of this particular behaviour.
I am not blind myself and have no idea how to map this in the right way,
which is why I am asking in this mailing list.
Thanks for your help!
Regards,
Martin Constantino–Bodin.
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