The Epping to Chatswood rail link (ECRL) (originally a part of the Parramatta Rail Link (PRL)) is a railway line in the northern suburbs of Sydney, Australia, which connects the suburb of Epping on the Northern line to the suburb of Chatswood on the North Shore line.The 13 km line is completely underground and includes three new intermediate stations: North Ryde (known as Delhi Road during much of the planning process), Macquarie Park and Macquarie University.