Documenting solution proposals for `highway=path`

[Duja]

Let me quote @Hungerburg from a related thread:

@Hungerburg

@aighes

How would you tag a way like below in your system?

I’d call this a leisure=track sport=mtb, in case it was a single-use trail. If it was a shared-use, path in order, appropriate sac_scale recommended if MTBers happen to care about pedestrians, that is.