Swing Door (train)
 Swing Door trains commonly known as Dogboxes or Doggies were wooden-bodied electric multiple unit (EMU) trains that operated on the suburban railway network of Melbourne Victoria Australia.Swing Door cars had outward-opening doors. They were reasonably narrow to ensure that two passing trains could not foul each other if doors were accidentally left open. At certain locations clearances were tight and there are stories of Swing Door cars losing doors that were not closed.