On 16/10/2012 17:45, Rob Nickerson wrote:
Hi Eckhart,
Your right, voting has come to an end for the Conditional Restrictions
proposal, which was approved. A statement was not made on this list as
Ole and I are working on how best to write the feature page so that
some of the concerns raised (about complexity / difficulty to
understand) are reduced as much as possible.
Like Martin, I'm not hugely convinced about the need for complicated
turn restrictions (most of the restrictions will be on the road and
the detail on the turn sign will simply be advanced warning for the
driver). Having said that, you have provided a few examples so I have
looked into it:
1. Currently we tag a no left turn restriction using "restriction =
no_left_turn".
2. If we want this to apply only to HGVs then the key is changed so
that it become "restriction:hgv =no_left_turn".
To draw the comparison with "Conditional Restrictions" the above tags
cover of <restriction type>, <transportation mode> and the tag value.
There is no need to specify <direction> as this is already captured in
the relation (from, via, to).
I am not sure you can say this. It should work where the junction angles
are close to 90 degrees, but for a shallow "Y" junction things might
need a hint as to whether it is a curve to the right with a junction to
the left, or a curve to the left with a junction to the right. The type
of restriction should reflect the road signs. At a T-junction, a
mandatory left turn could be considered different to a no right turn,
even if they are effectively the same thing. This cannot be derived from
the geometry alone.
Colin
_______________________________________________
Tagging mailing list
Tagging@openstreetmap.org
http://lists.openstreetmap.org/listinfo/tagging
