The Lyttelton road tunnel runs through the Port Hills to connect the New Zealand city of Christchurch and its seaport, Lyttelton. It opened in 1964 and carries just over 10,000 vehicles per day as part of State Highway 74. At 1,970 metres (6,460 ft), it was the longest road tunnel in New Zealand from its opening until 2 July 2017, when it was superseded by the Waterview Tunnels.