[2] The Deer Park–West Werribee railway line was built as part of the Regional Rail Link project, with the aim of increasing capacity on the rail network by separating regional and suburban passenger services in Melbourne's west.

The double-track line had two stations built on it, Tarneit and Wyndham Vale, to housing estates in those areas.

Test trains began operating upon completion of the line in October 2014 and passenger services started on 21 June 2015.

[3][1] In 2018 the Andrews Government announced the Western Rail Plan, which included electrification and quadruplication of the line.

During the 2022 Victorian state election, the Andrews Government committed to building two new infill stations on the corridor, Tarneit West and Truganina.