[Talk-GB] Tagging disabled parking

[Mark Goodge]

On 18/07/2022 20:41, SK53 wrote:
> I've never been sure that the tagging is particularly clear. In fact not 
> much seems to have changed since 2016 
> <https://help.openstreetmap.org/questions/53258/disabled-parking>.

Yes, indeed.

> I presume the best approach is to set capacity & capacity:disabled to 
> the same value (these are the only relevant tags in the iD preset)

Yes, next time I walk past I'll count the spaces and do that after I get 
home :-)

> The access tags disabled=* and access:disabled are not particularly 
> heavily used (less than 10% of the number of capacity:disabled). I'm a 
> little surprised that this is the case because I am aware of plenty of 
> places where a blue badge holder may be allowed to drive, but others are 
> not.

I did find the rather well-hidden documentation for the 
parking:condition tag which takes a value of "disabled". But I have no 
idea how well-used that is or how well it's typically interpreted by the 
various routers and renders. Also, the documentation says that it should 
only be used on ways, not areas. But a car park, as a whole, is an area. 
it looks to me as if that tag is intended to be used to indicate the 
presence or otherwise of on-street parking, rather than a separate 
off-street car park.

There's also this:

https://wiki.openstreetmap.org/wiki/Key:disabled

but that disagrees with the comments here:

https://wiki.openstreetmap.org/wiki/Talk:Key:access#Disabled_parking_access_for_blue_badge_holders_only

What I'm most concerned about is getting the tags correct so that a 
typical data consumer won't conclude that anyone can park there. Given 
the legal significance of Blue Badge parking in the UK (and, indeed, 
most of Europe), it does seem a little odd that there's no well-used and 
agreed way to map it.

For now I've gone with disabled=designated, which does seem to be the 
best match for the wiki.

> The brute force approach is to map the parking spaces themselves as well 
> as the car park, as tagging is much better established for individual 
> disabled parking spaces (via parking_space=disabled). There is no 
> equivalent tag I'm aware of for amenity=parking.

What seems to be a fairly common approach is to put the text "Blue 
Badge" in the name= field. See, for example 
https://www.openstreetmap.org/way/193866074

That, though, is a clear case of tagging for the render, and I was 
hoping that there might be something more robust.

Mark