Sydney Metro Western Sydney Airport, previously known as Sydney Metro Greater West, is a rapid transit rail project currently under-construction in Greater Western Sydney. The project involves the construction of a 23-kilometre (14 mi) line as part of the Sydney Metro system. The line will operate between St Marys, where the line will connect to the Main Western railway line, and Badgerys Creek Aerotropolis via the Western Sydney Airport. It is intended to provide public transport for the upcoming Western Sydney Airport. Construction of the line started in December 2022 and is expected to be completed in late 2026 in time for the opening of the airport.
The line will form Stage 1 of the proposed North South Rail Line, which would see the line extended north to Schofields to connect to the Richmond railway line, and south to the Main Southern railway line at Macarthur.
Six stations have been proposed for the line.
St Marys (interchange with T1 Western Line)
Orchard Hills
Luddenham
Airport Business Park
Airport Terminal
Aerotropolis