[Tagging] decide on a meaning for what is not documented [way: Expressway=yes/no versus new tags "dual_carriageway=yes/no", "limited_access=", "grade_separated"=?]

[Mateusz Konieczny]

20 Feb 2020, 13:02 by joseph.eisenberg at gmail.com:

> But
> perhaps we will decided that database users should interpret the
> geometry and name=/ref= tags of parallel highway ways to add this
> information in post-processing. Does anyone know if that is feasible?
>
AFAIK no, I tried to do this and failed.

I also asked others and noone was aware
about reliable way to do this.

That is why I used this tag in my city
(I needed it for listing of roads that are
missing contraflow for cyclists, 
obviously dual carriageways need to
be excluded in such listing).
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