[Tagging] Turn Lane Tagging?

James Mast rickmastfan67 at hotmail.com
Sat Jun 11 02:16:42 UTC 2016

I've been using the "turn:lanes:*=none;slight_right" & "slight_left;none" tags to indicate which side a new lane has been added on a highway when going from 1 to 2 lanes (sometimes "slight_left;slight_right" if the original lane is centered between the two new lanes).  How else are people to properly identify which side the new lane is being added to?  Take a look at this way ( https://www.openstreetmap.org/way/419799887 ) and take a look at the Bing imagery and look at the 'turn:lanes:forward' tag, and you'll see how this can, and would be valid.  It's allowing the router to know that a new lane is being added when combined with the next way ( https://www.openstreetmap.org/way/419799886 ) which has the "lanes:forward=2" tag.  It also allows the routers to properly tell people to get in the left lane if just ahead, there's a left turn they need to make.



OpenStreetMap | Way: ?Washington Avenue? (?419799886?)<https://www.openstreetmap.org/way/419799886>
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From: Tod Fitch <tod at fitchdesign.com>
Sent: Friday, June 10, 2016 9:45:56 PM
To: Tag discussion, strategy and related tools
Subject: Re: [Tagging] Turn Lane Tagging?

I haven't seen "none;slight_right" as a value and am not sure how that should look different than "slight_right" by itself. However "none" is a value listed in the wiki [1] and I use it a lot as I find multiple vertical bars hard to manually count/edit but I can see and count things like "left|none|none" easier than "left||" when editing in JOSM.

[1] https://wiki.openstreetmap.org/wiki/Key:turn#Turning_indications


On Jun 10, 2016, at 6:07 PM, Bryan Housel <bryan at 7thposition.com<mailto:bryan at 7thposition.com>> wrote:

Hey James,

(Disclaimer:  I work for Mapbox, but I am not part of the team that is doing the lane tagging, and can't speak for them).

I do need to know more about your concern:   Is `none` as part of a multiple turn lane option documented anywhere?

I'm asking because we are adding turn lane tagging to iD this summer [1], so I have been thinking a lot about turn lanes, and I have read through a lot of wiki pages and discussion pages, and this is the first I've seen anybody using a tag like `turn:lanes:backward=none;slight_right`.

It's really important to me that I get this as correct as possible, because I can't have iD overwriting somebody's valid lane tagging.  I'd like to be able to show visually what a tag like `none;slight_right` means on the ground.

Thanks, Bryan

[1] https://www.mapbox.com/blog/osm-gsoc-id/

On Jun 10, 2016, at 7:45 PM, James Mast <rickmastfan67 at hotmail.com<mailto:rickmastfan67 at hotmail.com>> wrote:

I honestly think Mapbox needs to stop immediately editing ways that they think are invalid.  I've seen several ways that I've work hard on, know are valid, and are being damaged by edits.  The 'NONE' tag in turn lanes is COMPLETELY VALID!!!!

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