Hi Gerd,
> Sure, the car driver always has to make sure that the route is
> allowed, but I think we want to avoid to calculate (and show)
> a route that is not allowed.
I think this is road sign like in row '7' here:
http://wiki.openstreetmap.org/wiki/Relation:restriction#Road_signs
Even if you convert it to '1b' with restriction=no_left_turn, the
problem remains the same.
> Only, for this very special case it would probably require many
> lines of code to find out which way is correct. It already required
> many lines to detect the special case ;-)
I haven't browse your code for restriction, but I get the feeling, that
it is complicated :)
> I'd prefer to change the wiki and say that this case must be avoided.
It won't be easy to define this case for a common mapper.
What condition is triggered in your code? A loop? Repeated node? Or
maybe multiple ways fitting as via for restriction?
--
Best regards,
Andrzej
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