Noticed the contentDB note, is it only subways at this point or are regional trains allowed for requests? I think a lot of people would love the amtrak acela express, since amtrak is popular in US

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I know it's cool to have them but while subways as a modpack is a decent idea to group your related trains together, a modpack like the tieless tracks stands on its own and belongs in a separate modpack.

I think it would be awesome to have a high-floor LRV like the LA Metro P3010 in the mod - it would fill a gap between the brown and red subway cars, which are high-floor and have very detailed, metro-like seating layouts, and the green subway car which is low-floor and more similar to a tram. This LRV could sit in-between, with a metro-like layout and high-floor boarding but also with the green car's wide line display and general design. Overall, I think it would add a lot to the mod. As for the HR4000, LA's next-gen subway car, it would provide a more streamlined, standard design so subway lines wouldn't be forced to use the unique brown subway cars.

P3010 References:

HR4000 References:

Osaka Metro 30000系 及び 21系 を作っていただけますでしょうか。