REV0: I don't uderstand how thats not possible when Subways go above and below ground. How hard is it for someone to do it with trains? is it the creater of this game? what the hell where they thinking???? I think we need someone to create a USA version of this game so that things are modern and realistic.

not possible because of game AI - such tracks will require new AI as i asked various modders in the past to develop one but it didnt work. tracks in ETST cannot be reverse engineered either, as I tested that before.

Sunken tracks are possible, the main problem is to force game not to generate tunnel portals on nodes and train lines being assignable underground, so far either options are working.

Revo: Can you make underground double sided and island stations showing interior? Underground commuter rails are common here in the USA such as Penn Station, Grand Central Station New York City and BackBay Station in Boston.

Update:
Train stop behavior fix on 2x2 and 4x2 sets.

i'll publish islands with german pack, and as for quad islands, i'm not sure. I dont think there's a need for quad islands, as it's 1 + 2 + 1 track essentially. Making a quad island network means I need to make new meshes and junctions from scratch and it's not as versatile as a normal config of 1 2 1 track config as separate entities

Amazing collection, there will be quad island stop versions (USA, NEC, EU,CHI) added to the collection?