[Tagging] Foot / sidewalk access tagging

Minh Nguyen minh at nguyen.cincinnati.oh.us
Sun Dec 18 23:30:27 UTC 2022


Vào lúc 15:00 2022-12-18, Zeke Farwell đã viết:
> I'll try to answer the original question as succinctly as possible.  As 
> I understand it, the combination foot=no + sidewalk=separate means 
> walking is not allowed at all on this street and the sidewalk belonging 
> to this street is mapped as a separate way.  Since the sidewalk belongs 
> to the street, foot=no applies to it as well.  It must be a sidewalk 
> where walking is not allowed since walking is not allowed anywhere on 
> this street.

Does any router actually interpret access tags as you're describing?

It seems like quite a stretch that a router would automatically infer a 
sidewalk's access tags from some parallel roadway, not least for the 
reason that we lack an established method to associate the sidewalk with 
the way. [1] (sidewalk=separate refers to a sidewalk way, but there's 
nothing in the other direction.) It would be something of a first for 
OSM that you could download a complete extract within a certain bbox, 
including any relation memberships, and the footways along the edges of 
this bbox could be subject to a tag that hasn't been downloaded yet.

Compounding matters, there are places where cyclists are prohibited from 
using sidewalks and other places where cyclists are required to use 
sidewalks when present. What should a router do if somehow it is able to 
determine the parallel roadway and finds a bicycle=no on it? What other 
access keys of the unconnected roadway are relevant to routing on a 
sidewalk? What about other things that are "part of the street", such as 
busways?

[1] https://community.openstreetmap.org/t/6255

-- 
minh at nguyen.cincinnati.oh.us





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