V4 CEE Train Set

[George]

xUSSR track are narrow because were drawn realistically, up-to-scale.
Standard (Open)TTD track are much wider than should be if compared to the train size.
But well, whole OpenTTD world is not scaled proportionally.

PS. You can reuse my nml code for tracks to make your custom tracks with 1.5kV system.
Or you can use Belgian track, those have 1.5kV DC and 25kV AC, if I remember correctly.

xUSSR rails is available at github, so you can use them under CC-BY-NC-SA 3.0 too
https://github.com/George-VB/xussrset

[Argus]

Multi unit wagons are missing for trains on broad gauge tracks