03-06-2016, 09:39 AM
The TGV has the same problem - starting out with ~12 car trains, then running them as close together as possible (~3 minute headways @ 300+ km/h, insane), then putting two sets together, then designing bilevel sets (Duplex), then coupling TWO Duplexes' together at those 3 minute headways... ahhhhh, it's heaven.