I've been giving a remake of an old (and forgotten) set I had of barcelona underground trains. There are a total of 10 different trainsets, which fill the whole timeline between 1926 and 2007. They are coded as low speed trains with very high capacity and power.
The first one is finished, the class 100 (1926). You can see the blog entry
here, where you can find some info, pictures and also a link to download this addon.
I hope you like it!
The second and third also are finished, the classes 200A (1944) and 200B (1953). You can see the blog entry
here with picks, info and download link, like before.