 There are substantial wrought iron and masonry viaducts at Sunbury, Malmsbury and Taradale, as well as two tunnels at Elphinstone and Big Hill.The Deniliquin line is used by many regional V/Line services and a commuter Metro Trains service.Sunbury line commuter services operate on the entire Melbourne section of the line between Sunbury and Southern Cross, where it then enters the City Loop.