Inner West Railway Line - Main Suburban Line

Main Suburban Line

The Main Suburban railway line is the technical name for the trunk railway line between Redfern railway station and Parramatta railway station in Sydney, Australia, but now generally refers to the section between Redfern and where the Old Main South Line branches off at Granville Junction. This term distinguished this trunk line from the Illawarra Line which branched south from the Illawarra Junction to Wollongong, and later the North Shore tracks which carried trains north over the Harbour Bridge.

This section of railway line is Sydney's oldest, opening in 1855. The line was quadruplicated to Flemington in 1892. The line saw its most dramatic change in the period 1926-1927, when the section from Redfern to Homebush was expanded from four to six tracks by the addition of two tracks initially intended for non-electric express trains. Prior to 1926, all stations on the line had platform faces to all four tracks, and the tracks were labelled as 'fast' and 'slow'. After the completion of works in 1927, only Redfern and Strathfield had platform faces on all six tracks. The four tracks now known as the 'Up and Down Local lines' and the 'Up and Down Suburban Lines' were electrified in 1928. It was not until 1955 that the 'Up and Down Main Lines' were also electrified to coincide with the opening of the Blue Mountains electrification program.