The Deer Park–West Werribee railway line is on the western fringes of the metropolitan area of Melbourne, Victoria, and is part of the Regional Rail Link. It was constructed between June 2012 and October 2014 and opened on 21 June 2015. The railway line will eventually become part of the metropolitan network under the Western Rail Plan, announced by the Andrews government in 2018.
The Deer Park–West Werribee railway line was built as part of the Regional Rail Link project that aimed to increase rail capacity by segregating regional and suburban passenger services in Melbourne. The line runs from three kilometres west of Deer Park railway station, on the Serviceton line, to Manor junction on the Warrnambool line. The double-track line includes new stations at Tarneit and Wyndham Vale. Geelong-Melbourne rail services run via the new route and so no longer have to share tracks with Werribee line services run by Metro Trains. However, trains on the route effectively provide a suburban service for Wyndham Vale and Tarneit residents.
- "Milestones". Regional Rail Link. Archived from the original on 17 June 2015. Retrieved 6 July 2017.
- "A Real Plan For Fast Regional Rail And Metro Rail For The West". Retrieved 30 April 2020.
- Lucas, Clay (9 October 2014). "First major Melbourne rail line in 80 years still six months off". The Age. Retrieved 6 July 2017.