[Tagging] foot=yes or bicycle=yes on track without other limitations?

[SomeoneElse]

Masi Master wrote:
> Hi,
> some mappers think, they have to set these access tags. Potlatch and 
> iD have a select menue, which shout "hey, please select foot & bicycle 
> are allowed". But I think this is not good! It is better to tag signs: 
> bicycle=yes only if there is a "bicycle free" sign. Same with other 
> signs. So if we see the tags, we know which sign is there, and backwards.

is that "bicycle=designated" or something else?  Does that explicit 
"here is a route that XXX are allowed/encouraged/required in some 
circumstances to use" signage occur anywhere outside of Germany?

> For the possibility to use the way by foot or bicycle, better tag 
> walking=yes or cycling=yes or something like that.
>

Not hugely popular, currently:

http://taginfo.openstreetmap.org/tags/walking=yes

Cheers,

Andy