[Tagging] Carriageway divider

Martin Koppenhoefer dieterdreist at gmail.com
Mon Aug 20 17:10:56 BST 2012

2012/8/19 Florian Lohoff <f at zz.de>:
> The turn happens on a node and not on
> a line.

+1, that is true, but each of these nodes is also part of at least 2
highways, and this is not too difficult to evaluate so common
turn_restrictions could be created automatically (on a local copy) for
routing. Ambiguity might arise in cases where some of these ways do
not have a continuous divider line.

> So interpreting this is difficult and in case there is a
> sidestreet beeing allowed to turn you split up the way in 3 parts around
> the node of the junction? Thats broken ...

this is not broken, that is what is supposed to be mapped, as the
white line will be interrupted there and not continuous. It is not
very beautiful to make these additional splits (beside the actual
crossing, for the divider), but it is what would be needed to get
exact divider details.

> There are streets where this might make sense - but using the solid_line
> as indication for turning is not. All IMHO.

well, the authorities see this differently, they do use these solid
lines to indicate you cannot turn ;-)


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