2009/9/21 Richard Mann <richard.mann.westoxf...@googlemail.com>:
> If we were just gathering data for routers, we would map every lane as a
> separate way, with relations for moving between each pair of adjacent lanes.
> If we were just gathering data for rendering a single-scale street map, we'd
> add tags to a single way, and probably not bother with lane info.

Not everything is tagged for the purpose of being rendered, nor should it.

> I think the most generally-usable structure is a single way with lane info.
> This could be done with tags (and probably needs to be, to start with),
> though you might hope that editors would find a way of presenting it so that
> it looks like a set of parallel ways with tied nodes.

We basically need to treat ways as a special type of relation, one
that has a number of lanes which can be tagged independent of the way
otherwise inherent the tags of the way.

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