It would be nice to have dual lane metro station or a metro station that covers all 4 tracks with one ploppable-station. As a graphic, the track could be split and the station could be placed right inbetween the tracks. This is very common here in Munich where I live. Here is an example for 2 track station:
http://upload.wikimedia.org/wikipedia/commons/c/cc/Munich_subway_GBR.jpg
4 track station as seen here, 2 tracks with one station inbetween each
http://upload.wikimedia.org/wikipedia/commons/0/01/U-Bahn-Station_Innsbrucker_Ring.JPG
It would be nice to have this, the entrances could be build automatically, having 2 entrances automatically placed on opposite places of the road to show that it is a bigger station. I like the look of the inbetween platform a lot, maybe it can be done.
http://upload.wikimedia.org/wikipedia/commons/c/cc/Munich_subway_GBR.jpg
4 track station as seen here, 2 tracks with one station inbetween each
http://upload.wikimedia.org/wikipedia/commons/0/01/U-Bahn-Station_Innsbrucker_Ring.JPG
It would be nice to have this, the entrances could be build automatically, having 2 entrances automatically placed on opposite places of the road to show that it is a bigger station. I like the look of the inbetween platform a lot, maybe it can be done.