important connection between west Auckland and the North Shore and carries the Upper Harbour Motorway. The original two lane bridge, opened in the 1970s, was substantially upgraded in 2007 as part of the Greenhithe Deviation project. It now forms part of the Western Ring Route. Central Motorway Junction. The Northern Motorway, Southern Motorway and Northwestern Motorway all converge in central Auckland in a motorway junction (known locally as Spaghetti Junction due to its complexity). A series of upgrades were completed in 2007 to complete links between all motorways and improve access to Grafton Gully and the Ports of Auckland. Victoria Park Tunnel. This 440 metre long tunnel carries three lanes of northbound traffic on the Northern Motorway heading towards the Auckland Harbour Bridge. The tunnel was completed in 2012, alleviating a major bottleneck on the Victoria Park viaduct. Newmarket Viaduct. This 700 metre long motorway viaduct carries the Southern Motorway over Newmarket. The original viaduct was opened in 1966 but was replaced with a completely new structure with higher earthquake standards and an extra southbound lane in 2012. Māngere Bridge. This bridge carries State Highway 20 over the Mangere Inlet of the Manukau Harbour. The opening of the Waterview Connection in July 2017 linked SH 20 to State Highway 16 (the North-Western Motorway), and completed the Western Ring Route. This increased the importance of this bridge and both state highways, and relieved pressure on the Auckland Harbour Bridge and the central motorway system by providing an alternative route for north–south traffic not bound for the city. Future projects Providing new roading connections in Auckland, or widening existing corridors, is becoming increasingly difficult and expensive. This means that most new roading projects are likely to be located in greenfield growth areas at the periphery of the Auckland urban area. Major roading projects currently planned or proposed include: East West Link. A proposed $1.85 billion four-lane highway linking State Highway 20 at Onehunga with State Highway 1 at Mount Wellington, primarily to reduce travel time for freight trucking. A change of government at the 2017 general election saw Labour and its coalition partners abandoning it, with other strategies being proposed to relieve pressure on the existing route. Second Harbour Crossing. A proposed tunnel between the city centre and the North Shore to complement the Auckland Harbour Bridge. This project has both a road and public transport component and is currently scheduled for