> Date: Fri, 14 Mar 2014 00:03:43 +0200
> From: marko.makela@iki.fi
> To: mkgmap-dev@lists.mkgmap.org.uk
> Subject: [mkgmap-dev] Turn restrictions with role=via ways
>
> Now, with all these routing improvements, I wonder if it would be
> possible to extend our support for turn restrictions.
>
> Some mapper seems to prefer via ways to via nodes in this crossing:
>
> http://www.openstreetmap.org/way/30692839
>
> This 2-node way is a role=via member of a no_u_turn restriction that has
> 4 ways as members: from,via,via,to. It is also a role=via member of a
> no_left_turn restriction.
>
> The no_u_turn restriction could have been mapped with three ways as
> from,via,to and the no_left_turn could have been mapped with having this
> way as role=from, and a node as role=via. Even if I changed the map like
> that, mkgmap would still ignore the no_u_turn, because the role=via
> member would be a way.
>
> So, I wonder if we could start supporting this style of mapping? There
> are lots of dual carriageways in city areas where such turn restrictions
> are common, at least for no_u_turn.
>
> Marko
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