To upgrade an important part of the Western Ring Route road of national significance project.
The Causeway is a key part of the Western Ring Route - one of the Government's seven roads of national significance to help promote economic growth. Once completed, the Western Ring Route will provide a strategic alternative to SH1, central Auckland and the Auckland Harbour Bridge. It will link with the Waterview Connection project and its new interchange at Great North Road - connecting SH16 with the Southwestern Motorway (SH20).
The causeway upgrade will provide the following benefits to road users:
- Improved traffic flow and travel times with the addition of more lanes
- Less flooding on the causeway
- Quicker bus trips
- Improved pedestrian and cyclist access across the motorway.
As part of the Causeway Upgrade Project, NZTA and its alliance partners will:
- Widen the causeway to add lanes and create more capacity
- Raise the causeway and the adjacent cycleway to reduce flooding
- Construct new bus priority lanes on the motorway shoulders
- Improve access across the motorway for pedestrians and cyclists
The Causeway Alliance
The Transport Agency has engaged the Causeway Alliance to deliver the Causeway Upgrade Project from Great North Road west to the Whau River bridge just before Te Atatu, a 4.8km stretch of State Highway 16.
The Causeway Alliance is made up of AECOM, Coffey, Fulton Hogan, Leighton Contractors, Sinclair Knight Merz and Transport Agency itself, bringing together specialist skills in a range of safety, engineering, design, construction, environmental protection, management, community engagement, commercial and support disciplines.