The SSFL branches from and runs parallel to the Main South line for its full 36 kilometre length from Macarthur to Birrong. The line is an unelectrified, bi-directional single track with 1,800m long passing loops at Glenfield and Leightonfield. Apart from its end points, the SSFL has no interface with the existing network. From a junction south of Macarthur, the line runs to the west of the existing tracks to Ingleburn where it joins an existing relief line to Glenfield built in the mid-1990s. Just north of Glenfield the line crosses to the east of the existing tracks via a flyover, with future access to the proposed Moorebank Intermodal Terminal. The line continues to parallel the Main South line to Sefton, incorporating the existing Leightonfield Freight loop and sidings. At Sefton Junction, the line passes under the Bankstown line and joins the Metropolitan Goods line which provides access to the Enfield and Port Botany marshalling yards.
History
Delays to freight services operating to and from Sydney via the Main South line had long been a problem, but it wasn't until the formation of the National Rail Corporation that any plan was devised to resolve it. In February 1992, the Federal Government allocated $71m for the construction of a dedicated freight line from Macarthur to Enfield as part of the One Nation infrastructure project. It soon became apparent that to complete the project would cost in the region of $250m. Instead the funding was used to complete a number of smaller projects, including building a 6.6 kilometre relief line between Ingleburn and Glenfield. This single, non-electrified line was used by both CountryLink passenger and freight services.
Construction
In May 2006, the Australian Rail Track Corporation revived the project. Approval was obtained in October 2008 and construction commenced in early 2009, focusing on the section between Cabramatta and Sefton. By August 2009 construction was under way along the whole corridor. In November 2009 poor planning led to the ARTC suspending the project for 10 months while it relocated utilities. In September 2010 the ARTC announced the resumption of the project with an estimated completion date of early 2013. In June 2012, the Sefton Junction to Leightonfield section opened allowing the connection from the yard at the latter to the RailCorp network to be severed. In December 2012, the rest of the line was completed officially opening on 21 January 2013.
Station works
The construction of the new line required modifications to several stations along the route. Minto, Casula, Warwick Farm and Sefton received Easy Access upgrades. A new concourse was constructed at Cabramatta and the footbridge was extended at Leumeah.
Services
The line is normally only used by freight services, but during engineering possessions on the adjacent Transport Asset Holding Entity tracks, NSW TrainLinkXPT services have travelled on it. Freight trains travelling to the Minto Container Terminal continue to travel on Transport Asset Holding Entity tracks.
