[Tagging] Feature Proposal - RFC - Turn Lanes
zverik at textual.ru
Tue Oct 18 15:06:14 BST 2011
> It is not too late to change this. We must change about 11+2+7=20
> tags worldwide if we consider to modify the notation of the
I'm strictly against global retagging. And it's impossible to
unambigously resolve number of lanes to lane numbers in most of those
> Using verbal values like left and right (except turn...) is IMO more
> fault-prone than defined lane numbers. We need anyway suitable editor
> tools for lanes.
Actually, this proposal was designed with the aim of not requiring
special editors or plugins to mark turn lanes...
> It leaves open too many issues which could appear later: How to tag
> the lane width, different surfaces and restrictions like forbidden
> lane change? How the data consumer knows, how the lanes of the road
> segments are connected together? And so on...
...and obviously, this implies some restrictions on tagging scheme:
it's unpractical to add information for every lane into tags: there
would be too many tags for each road segment. So in the proposal there
are no properties for separate lanes: this can be impoved later,
possibly with relations. For example, Tordanik is drafting out
with exactly those points in mind.
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