The North West Rail Link will serve an area of Sydney. Minister for transport Gladys Berejiklian said overarching approval has been given for the entire project, as well as approval to start construction of the 4km skytrain section and 15.5km of twin tunnels.

The North West Rail Link will include eight railway stations at Cherrybrook, Castle Hill, Hills Centre, Norwest, Bella Vista, Kellyville, Rouse Hill and Cudgegong Road. The viaduct structure will run between Bella Vista and Rouse Hill.