[Tagging] Turn Lane Tagging?

Marc Gemis marc.gemis at gmail.com
Sat Jun 11 05:44:54 UTC 2016


I must admit I have never seen none;slight_right in any of the lane tagging.
None is only used in cases where there are no arrows on the ground for
that particular lane. Furthermore empty is also not a valid value.
Empty is only valid in e.g. maxspeed:lanes to indicate that the lane
has the default value set by maxspeed. Since there is no default
defined for turn:lanes, one has to specify a value for each lane.

Please take a look at
https://wiki.openstreetmap.org/wiki/User:Dex2000#zeitliche_Auswertungen_Overpass-turbo-abfragen
It contains several OverPass queries for the validation of turn:lanes
(the page is in german, but search for turn:lanes)
Those queries were used by the German community for their week
assignment on turn:lane mapping.

In order to express that 1 lane becomes 2 lanes, one could use the
proposal http://wiki.openstreetmap.org/wiki/Proposed_features/transit,
unfortunately imagic is no longer active on OpenStreetMap.

regards

m ( a heavy lane mapper from Belgium).

On Sat, Jun 11, 2016 at 6:00 AM, Bryan Housel <bryan at 7thposition.com> wrote:
> Thanks James for the explanation, it does make sense now. I hope I wasn’t
> the only person confused to see that tag..
>
> I appreciate all the work that you’ve put into adding lane details OSM.  My
> goal is to make lane tagging easy for everyone.
>
> That said, I think you might be the only person in the world tagging turn
> lanes with `none;something`.  I checked taginfo and it seems like for value
> combinations like `left;none` there are around 5 in the world.  Yes, that
> count is off because Mapbox data team deleted some of yours and they
> shouldn’t have, and it’s great that they apologized, but still we are
> talking about something that looks kind of like an error and hasn’t been
> discussed anywhere that I can find.
>
> For what it’s worth, I have also seen a few people suggest tagging like
> `width:lanes:start = 4|0`  `width:lanes:end = 4|4` (e.g. in meters) to
> describe the shape of that segment of road that widens into the turn lanes.
> Taginfo also suggests that this is used like 10 times in the whole world,
> and I also haven’t found it discussed anywhere.
>
> Maybe this is a situation where the tagging list can discuss and come to
> consensus and do the whole wiki proposal voting thing?
>
> We still have several months before the turn lane tagging will be available
> in iD, so there is plenty of time to work out these details.  In the worst
> case, we just won’t support it, and instead show a ‘?’ in the interface to
> indicate that there is some unrecognized tag in that lane and we will leave
> it alone.
>
> Thanks, Bryan
>
>
>
>
> On Jun 10, 2016, at 10:16 PM, James Mast <rickmastfan67 at hotmail.com> wrote:
>
> 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.
>
> ________________________________
> 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
>
> -Tod
>
>
> On Jun 10, 2016, at 6:07 PM, Bryan Housel <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> 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!!!!
> https://www.openstreetmap.org/user/rickmastfan67/diary/38833
>
>
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