[Routing] Bad routing: U turns for highway links?

[Anthony]

On Wed, Jul 21, 2010 at 2:01 PM, Anthony <osm at inbox.org> wrote:

> What information?  It's a really sharp turn.  That's already encoded in the
> data.  In fact, Cloudmade's router even *says* "make a sharp left".  So the
> router already knows it's a really sharp turn.
>
> What more information do you need?
>

I should also point out that it's a case of an xxxx_link road combining with
an xxxx road.  It's probably a general rule that this means "merge" and not
"intersection".

If not, maybe we could tag the node with some sort of merge=yes?  That would
clearly distinguish between an intersection and a merge, if in fact there
are instances of xxxx_link combining with xxxx roads which aren't merges.

OTOH, maybe we could make merge=yes the default in that situation, and just
tag merge=no in those cases where it isn't the case.

I don't have a database handy right at the moment, so I'm not able to do a
proper sampling of the instances of xxxx_link merging with xxxx.
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