[Tagging] What classification for a connecting link?

[M∡rtin Koppenhoefer]

2010/6/17  <charlie at cferrero.net>:
> "The highway tag is the primary tag used for highways. It is often the
> only tag.  It is a very general and sometimes vague description of the
> importance of the highway for the road grid. "
>
> The term "importance" isn't defined


Why shouldn't importance not be defined? It is pointing out that it's
about hierarchy: (A is more important than B, B is more or less
equally important than C, ....). You try to create a hierarchy of the
street grid that works starting from the upper end and from the lower
end. It surely also has to do with "size / connectivity / capacity",
but this to compare nearby (and countrywide) alternatives, not on an
absolute scale.

cheers,
Martin