https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |
https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |
Newbie - I've found a situation asking the same question. I couldn't figure out a way to depict the situation that would agree with everything else and have left as is. Doing what is here would be more acceptable if road type 'dual carriageway' existed - as this isn't and the lines would happily represent the running lanes.
Methinks one needs to remember the purpose of the mapping. To me, this is to inform road users of the roads without specifically stating how a manoeuvre is done. Therefore the fact there's a R-turn filter lane does not need to be known. Effectively all you have is a lane that's wide enough for 2 vehicles side by side with a centreline !
It's possible to map lanes with the "turn:lanes" tag.
Here's an example https://www.openstreetmap.org/way/24413915
and here's a description on a wiki page:
https://wiki.openstreetmap.org/wiki/Key:turn#Turning%20indications%20per%20lane
(d'oh - that was me - forgot to log in)
Mine's here:
http://www.openstreetmap.org/#map=19/54.24745/-3.04328
Next Q is what about the central reservation made of tarmac ? Can turn:lanes cope with a contraflow: 3 lanes: upstraight|upright|downstraight ? How is up/down defined?
I think drawing a line per lane makes more sense and is clearer.
Yours is an interesting one, because looking at the imagery someone's gone out of their way to mark the central bit of the road in red. Part of the logic behind "map multiple lane roads as one road" has always been because not everything has to follow the highway code - to an emergency vehicle, it's all potentially "just road". I've checked on the talk-gb list https://lists.openstreetmap.org/pipermail/talk-gb/2014-November/thread.html#16769 , and it's basically about "physical barriers" - if you can drive across (a police car doing a sudden u-turn, say) it's one road, more than one lane; if you can't, it's two roads.
On the turn lanes wiki page https://wiki.openstreetmap.org/wiki/Key:turn#Turning%20indications%20per%20lane it includes an "Example for a road with both directions". You can use :forward and :backward (in the direction of the edited way) to separate out lanes in one direction from lanes in another.
Finally got around to fixing this. See http://www.openstreetmap.org/changeset/35517460#map=15/53.0325/-0.5258&layers=N .