OK so commuter rail yards are indeed service_stations.  I'll go back and edit a 
few of them.  Perhaps I should attempt to edit the OSM wiki page to 
clarify this. I did like how the "yards" seemed to stand out at higher zoom 
levels and had a contrasting color (brown) from all the other "operating 
sites." 
==============
It may be useful to add a tag category (not one that necessarily renders) such 
as railway:yard = classification (hump yards, larger flat switching yards), 
storage, interchange (yard where two railroads exchange traffic), local (road 
manifest or "regional" drops off/picks up on the way to another large yard, 
local freights originate here and then switch out local customers), intermodal, 
transload, etc.

How does one propose a tag "officially?" I mean I don't plan on going into OSM 
wiki and adding tags unilaterally. And I already suggested two more in my last 
post (defect_detector=high_car, railway:position:prefix)
====================================

I like your Interlockings draft.  Definitely seems like there's a conflict in 
terminology.  I know on the old Pennsylvania Railroad, it was only an 
"interlocking" if it had an onsite tower, otherwise it was a controlled point.  
So if I'm reading this right, an "interlocking" is a Relation that contains a 
signal_box (legacy tower or just an equipment enclosure), the signals, 
switches, AND an operating site Point which can either be a "crossover" or a 
"junction."

That's a little confusing since I had assumed a "junction" would be more like a 
named point where two lines diverged which sometimes gave it's name to the 
nearby town.  Examples: 
https://en.wikipedia.org/wiki/List_of_New_Jersey_railroad_junctions and I have 
been adding in some of these.

Another point of confusion is that some crossovers and junctions are obvious, 
yet how would you describe a control point at the end of a siding where two 
tracks become one? Or one main track splits into two "equal" mains?  


> In general on the rendering, that's very much a work in progress too,
> because the team that makes that happen just completely switched rendering
> engines a few months ago due to some software in the old stack being
> deprecated, and had to completely rewrite the rendering scheme as a
> result.  There's a lot left to do on the new scheme write up, so it's hard
> to tell which things are intentionally not rendered, which just aren't
> implemented yet, and which ones are local issues that the rendering team
> didn't even *know* were an issue or question here (like track labelling in
> North America).

Focusing on the last line... are you referring to the reference/name tagging or 
track numbering.  I've noticed that the line name (subdivision/district) only 
appears when the ref field is filled out.  EIke showed me an example in Europe 
where even the tunnel name appeared along with the "ref."  I did see a few 
examples in the lines originating from Portsmouth/Norfolk, Virginia where the 
ref numbers were tagged on CSX and NS lines and even the line name started 
rendering. Of course it's nearly impossible to figure out what reference codes 
a US railroad uses even with an ETT.

And if there's ever a US signal tagging or documenting committee I'd be happy 
to participate.  Reading the European-centric rules for tagging still confuses 
me. I still can't tell how I'd tag a US CP/"home"/interlocking signal vs. an 
intermediate/automatic signal.  And while some roads use GCOR  or NORAC, others 
use their own rule book

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