[Tagging] Tagging u-turn restriction with continuous painted line

Eckhart Wörner ewoerner at kde.org
Tue Jul 3 13:26:21 BST 2012

Hi Janko,

Am Dienstag, 3. Juli 2012, 14:12:16 schrieb Janko Mihelić:
> I think this is the wrong way to look at this. If you rely on routers to
> make this kinds of decisions, you are going to have a lot of problems. What
> if there was a roundabout island where you were allowed to u-turn? You
> should put in a "allow_roundabout_u_turn" or something. Also, some routers
> are not going to have the same logic.
> Anyway, if you don't put a "no_u_turn" restriction in this case, routers
> are rarely going to route through that, so I think we are safe either way :)

They will happily use that turn for re-routing. *Always* tag such restrictions.
This is not limited to roundabouts, it is scary how many turn restrictions are missing in general because people think they are "obvious".


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