The Metro North West Line is a rapid transit rail line in Sydney, New South Wales, Australia. The first and currently the only line on the Sydney Metro network, it commenced operation on 26 May 2019, running between Tallawong and Chatswood.

The Epping to Chatswood rail link (ECRL) is a railway line in the northern suburbs of Sydney, Australia, which connects Epping station on the Northern line with Chatswood on the North Shore line. It was formerly considered its own railway line, but is now considered part of the Metro North West Line.