On Mon, 13 Apr 2020 at 12:56, Paul Allen <pla16...@gmail.com> wrote:
> On Mon, 13 Apr 2020 at 17:43, <lukas-...@web.de> wrote:
>> The second goal my proposal wants to message is to deprecate tagging 
>> "crossing=traffic_signals" together with "highway=traffic_signals" on the 
>> same node. Especially if you're saying this is a full crossing mapped. It 
>> breaks the highway=crossing - tagging scheme we use for all other types of 
>> crossing (except crossing=no). Some mappers use "crossing=traffic_signals" 
>> together with "highway=traffic_signals" on the same node als a shortcut for 
>> "lane traffic signal" and "foot traffic signal" because it is rendered as 
>> two traffic signals in JOSM. Or for mapping traffic signals for crossing 
>> cyclists. But I think in every case it is better to use two different 
>> (nearby) nodes for that.
>
> Am I misunderstanding you?  You propose using two nearby nodes for
> https://goo.gl/maps/3Sg5ndQ2ZCMBN9uy9  You can just see the yellow
> pedestrian-control box at the left.  It controls the crossing (marked with 
> studs)
> going from left to right across the picture.  The same lights that tell 
> motorists
> to stop for pedestrians also control traffic flow at the T junction ahead.  
> The
> same set of lights is both a highway traffic signal and a crossing traffic 
> signal.
> This sort of thing is not uncommon in the UK, with the same set of lights
> being used for both purposes.

My understanding was that traffic signals=crossing on demand is meant
for things like https://www.openstreetmap.org/node/2771622922 (
https://www.mapillary.com/map/im/2oyFQXVHvy2r-XypCZTECg ) however I
might be wrong? Or https://www.openstreetmap.org/node/1416834957 (
https://www.mapillary.com/map/im/DkuEFqSbOuQPGMtABsFFCA ) including
cyclists? (Esri is good for satellite imagery of these)

Personally I find highway=traffic_signals + crossing=traffic_signals
on one node sufficient for these crossings.

Currently the wiki page says "traffic_signals=crossing_on_demand makes
it easy to mark all traffic lights which do only control a crossing",
again I personally find highway=traffic_signals +
crossing=traffic_signals sufficient for that - maybe I'm missing
something. Of course any new tags can be proposed. But I would suggest
adding some real-world photos of crossings that would be tagged with
crossing_on_demand to the wiki page.

--Jarek

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