The Causeway Upgrade is a 4.8km long project on Auckland’s Northwestern Motorway (SH16) between Great North Road Interchange and Te Atatu Interchange, and is a key component in completing the Western Ring Route.
The Causeway Upgrade Project involves raising a section of the Northwestern Motorway to prevent flooding and widening it to provide additional capacity. The cycleway alongside the motorway is being raised, widened and upgraded, too. This project is a key part of the Western Ring Route which once complete, will provide an alternative to SH1, central Auckland and the Auckland Harbour Bridge.
Improved travel time reliability with the addition of more lanes
Less flooding on the causeway as the road and cycleway are raised
Dedicated bus shoulder lanes for more direct bus trips
Improved pedestrian and cyclist access
Stormwater treatment installation