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How to map Center Turn Lanes?

Specifically, what are the lanes, turn:lanes, and change:lanes tags for the following example?

https://www.branson.com/wp/wp-content/uploads/2017/03/170323-Center-Lane-1024x683.jpg

This is what I have so far:

lanes = 3

lanes:forward = 1

lanes:backward = 1

lanes:both_ways = 1

turn:lanes:both_ways = left

change:lanes = ??

I was also wondering if the centre_ turn_lane tag would be applicable in this scenario?

Thank you!

centre_turn_lane lanes turnlanes

asked 09 Jul '18, 21:41

MeghanKNg
171●9●10●17
accept rate: 0%

One Answer:

The tags you have so far (lanes, lanes:forward, lanes:backward, lanes:both_ways, and turn:lanes:both_ways) is all you need.

change:lanes is not needed in this case as you can change into or out of that lane at any place which is the default assumption for where you can change lanes.

centre_turn_lane is, I think, an earlier attempt to tag the situation but I don't think it is current tagging practice.

answered 09 Jul '18, 23:20

n76
10.8k●10●82●172
accept rate: 17%

Hi stf, can you further explain why you wouldn't need the change:lanes tag for center turn lanes with lanes:both_ways?? Does this only apply to the above example or would it be the same for say: lanes = 5, lanes:forward = 2, lanes:backward = 2, lanes:both_ways = 1

On overpass turbo, for the 5 lanes tag I have found people use these tags:

change:lanes:backward = not_left|yes, change:lanes:both_ways = yes, change:lanes:forward = not_left|yes,

On overpass turbo, for the 3 lanes (above example) tag I have found people use these tags:

change:lanes:backward = not_left, change:lanes:both_ways = yes, change:lanes:forward = not_left,

Thanks

(06 Dec '18, 17:21) ragingtoro