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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