[Swede]

This thread will be mostly a compilation of updates copied from SSC, but I'll start of with the existing rail transit.

100 station subway system (tech once based on the NYC's IND iirc)
53 station commuter rail system
12 stop urban tram line
3 suburban tram lines (10, 13 & 25 stops)
38 station suburban narrow gauge railway (3 branches)
18 station suburban rail line that's kinda LRT but yet not (two small branches at the outer end)
3 station Airport Express train

The map!
This version was introduced this fall and is very different in style to the ones before it.

source

The trains!

Airport Express:

Arlanda Express airport transit train by Gösta Knochenhauer, on Flickr

Commuter rail:

still 09:19 by Gustav Svärd, on Flickr


Subway:

Stahp already by Gustav Svärd, on Flickr

Roslagsbanan (the narrow gauge one):

Stockholm - Roslagsbanan - Rolling stock details by Ingolf, on Flickr

Saltsjöbanan (the kinda LRT one):

Vorortzug der Saltsjöbanan by kaffeeeinstein, on Flickr

Lidingöbanan:

source

Nockebybanan:

Alvik by Ernst Kers, on Flickr

Tvärbanan:

SL 420 [Stockholm tram] Tvärbanan by Howard Pulling, on Flickr

Spårväg City (the urban tram):

Stockholm, Strandvägen 05.07.2015 by The STB, on Flickr