BD intersection is a Loaf of News & Technology, Science & Fiction, shopping & Entertainment & B$ in general. BDi is a semi-obscure blog for mature readers.
https://en.wikipedia.org/wiki/Medium-capacity_rail_system
https://en.wikipedia.org/wiki/Taipei_Metro_Circular_Line_EMU
https://en.wikipedia.org/wiki/British_Rail_Class_320
