https://en.wikipedia.org/wiki/Kinki_Sharyo_SLRV
https://www.dart.org/about/expansion/downtowndallas.asp
https://www.dart.org/about/expansion/downtowndallas.asp#whatisD2
https://www.dart.org/about/expansion/expansionmaps.asp
https://www.dart.org/about/expansion/platformextensions.asp
https://jf-databits.blogspot.com/search?q=rolling+stock