[Tagging] Tagging for the renderer : One-way "flow" bicycle tracks

[Niels Elgaard Larsen]

Volker Schmidt:
> Be careful: oneway=* is a legal access tag, only valid for vehicles, not for pedestrians.


We do have a lot of highway=footway,oneway=yes
at museums, train stations, airports, zoos, etc.
Which is useful for routers.

The wiki does mention vehicles. It may not always be a very legal restriction. And in 
many cases it could be considered false oneway footways. E.g., a museum might have a 
signed direction thorough the exhibition, but usually you can still wander back and 
forth a bit (not at the crown jewels).

Still, if think it makes sense.

E.g.,
https://www.openstreetmap.org/way/368800221

Although, using an OSM router here is already cheating.

oneway:foot and foot:backward is already documented in the wiki and could be used on 
mtb paths.

I see that we have 4 oneway=recommended


> On Sat, 9 Sep 2023, 07:05 Andrew Harvey, <andrew.harvey4 at gmail.com 
> <mailto:andrew.harvey4 at gmail.com>> wrote:
> 
>     I have previously proposed the tag path=mtb
>     https://wiki.openstreetmap.org/wiki/Proposal:Tag:path%3Dmtb
>     <https://wiki.openstreetmap.org/wiki/Proposal:Tag:path%3Dmtb> as a way to say
>     it's a purpose built mountain biking track (which if it has features like jumps,
>     skinnies, berms etc would make it such). Unfortunately the proposal could not
>     gain a consistent consensus about the best way to tag purpose built mountain
>     biking tracks/trails and didn't develop further, so while it won't impact
>     rendering, you can still use this proposed tag.
> 
>     On Sat, 9 Sept 2023 at 03:09, Bryce Nesbitt <bryce2 at obviously.com
>     <mailto:bryce2 at obviously.com>> wrote:
> 
> 
>         I recently went on a hike, guided only by OSMAnd.  We ended up planning a route
>         that took us uphill on what turned out to be a long series of one
>         way downhill mountain bike flow tracks.
> 
>         I have no problem with the flow track: just had it been clearly delineated we
>         would have planned a different route more suited to hiking.
>         But I was left without clear tagging ideas.
> 
> 
> 
> 
>         One of the trails was
>         https://www.openstreetmap.org/way/593945914#map=19/37.99250/-122.50667
>         <https://www.openstreetmap.org/way/593945914#map=19/37.99250/-122.50667>
>         highway <https://wiki.openstreetmap.org/wiki/Key:highway?uselang=en>	path
>         <https://wiki.openstreetmap.org/wiki/Tag:highway=path?uselang=en>
>         horse <https://wiki.openstreetmap.org/wiki/Key:horse?uselang=en>	no
>         name <https://wiki.openstreetmap.org/wiki/Key:name?uselang=en>	Bunny
>         oneway:bicycle
>         <https://wiki.openstreetmap.org/wiki/Key:oneway:bicycle?uselang=en>	yes
>         <https://wiki.openstreetmap.org/wiki/Tag:oneway:bicycle=yes?uselang=en>
>         surface <https://wiki.openstreetmap.org/wiki/Key:surface?uselang=en>	dirt
>         <https://wiki.openstreetmap.org/wiki/Tag:surface=dirt?uselang=en>
> 
>         With a clear direction, as it has jumps that can only be completed in a
>         single direction, and is all but impossible to cycle the "wrong way" on.
> 
> 
> 
> 
>         Is this trail tagged the best that can be?
> 
>         Is there a way to better hint to rendering that this should look different
>         from a "standard" hiking trail, perhaps tagged:
>         highway <https://wiki.openstreetmap.org/wiki/Key:highway?uselang=en>	path
>         <https://wiki.openstreetmap.org/wiki/Tag:highway=path?uselang=en>
>         name	Hiking Trail
>         surface	dirt
>         bicycle <https://wiki.openstreetmap.org/wiki/Key:oneway:bicycle?uselang=en>
>         	permissive
> 
>         	
> 
> 
>         I see that even /OpenCyclemap /does not draw directional arrows on the
>         "Bunny" trail or other oneway:bicycle=yes routes.
> 
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-- 
Niels Elgaard Larsen