Under construction:
To be constructed:
- SH16 Royal Road Interchange
- SH16 Te Atatu Road Interchange
- SH16 St Lukes Road to Great North Road Interchange
- SH16 Causeway upgrade
Completed and open
- SH16 Westgate Pedestrian and Cycle bridge
- SH18 Greenhithe Deviation
- SH18 Upper Harbour Bridge
- SH18 Hobsonville Deviation
- SH20 Mt Roskill Extension
- SH20 Manukau Harbour Crossing
- SH20 Walmsley Road Interchange upgrade
- SH20-1 Manukau Extension
- SH20 Maioro Street Interchange
SH16 Lincoln Road Interchange
Construction start: November 2010
Estimated completion: Early 2015
Cost: $115 million
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Key features
- A new, improved interchange at Lincoln Road
- New six lane bridge at Selwood Road (future-proofed for seven)
- Widened and lengthened bus shoulders along SH16 for improved bus journey times during peak hour
- Widening the motorway to three lanes in each direction
- A new motorway bridge over the Henderson Creek
Benefits
- Extra lanes to help relieve congestion on SH16
- Wider and realigned on and off-ramps for better safety and traffic flow
- Signalised intersections at either side of the interchange for safer movement between the motorway and local roads
- Better access to the busy industrial area on Lincoln Road
Walking and cycling
- A new 3m shared pedestrian/cycle path across the Selwood Road Bridge
- A wider and better quality shared path over the Henderson Creek Bridge
- Extension of the North-Western Cycleway between the Henderson Creek Bridge and Lincoln Road
- Access for cyclists and pedestrians will be maintained during construction
- For more information on the North-Wester Cycleway see Auckland Transport
Protecting the environment
- Two new wetlands to catch and filter stormwater run-off from the motorway
- Silt fences and sediment ponds to protect marine life and waterways during construction
- Water carts to minimise dust from works
- Extensive planting with native coastal species
For more information, please see the following:
- NZTA opening Auckland’s Lincoln Road work site for community (Media release - 12 November 2012)
- Frequently Asked Questions (November 2012) (PDF, 93 KB)
- Lincoln Road Interchange before and after improvements (November 2012) (PDF, 2.77 MB)
- Henderson Creek Bridge construction phases (PDF, 687 KB)
SH16 Royal Road Interchange
Construction start: TBA
Construction finish: TBA
Cost: TBA
Key features & benefits
- Overbridge widened to improve capacity
- Longer and safer ramps
- Upgraded cyclist and pedestrian facilities
SH16 Te Atatu Road Interchange
Construction start: Late 2013
Construction finish: Late 2016
Cost: $100 million
Key features & benefits
- Enlarging and replacing all four ramps to improve safety
- Additional lane in each direction (3 lanes each direction) to improve capacity
- Widening Te Atatu Road bridge with an additional lane to improve capacity (3 lanes in each direction)
- Lowering the level of the motorway to give better freight clearance beneath Te Atatu Road Bridge
- Providing stormwater treatment
Going by bus, on foot or by cycle
- Adding bus shoulders to SH16 for quicker bus trips during peak periods
- Bus shoulders continue on east facing ramps to give bus priority at Te Atatu Road
- Removal and replacement of the existing pedestrian underpass
- Pedestrian and cyclist crossings throughout the interchange
- Improvements to existing cycling facilities on Te Atatu Road and the Northwestern Cycleway
Urban design & the environment
- Urban design themes will be consistent along the SH16 corridor integrating the Hobsonville motorway with the Waterview Connection
- Landscaping and planting throughout the interchange
- Replacement of existing Jack Colvin Park spectator seating
- Noise walls, bunding and screen planting to minimise noise for neighbours
SH16 St Lukes Road to Great North Road
Construction start: Early 2014
Construction finish: Late 2016
Cost: $50 million
Key features & benefits
- Widening the motorway from three to four lanes in each direction
- Improvements to ramps and the motorway overbridge at St Lukes Interchange
- New alignment and layout will improve traffic travelling to and from the Waterview Tunnels and SH16
- Additional lanes will unlock capacity on SH16, help relieve congestion and improve safety
Going on foot or by cycle
- The Northwestern Cycleway will be retained between Great North Road and St Lukes Road interchanges
Urban design & the environment
- Urban design themes will be consistent along the SH16 corridor integrating the Hobsonville motorway with the causeway, Waterview Connection and Central Motorway Junction
- Landscaping and planting throughout the interchange
- Walls and screen planting to minimise noise for neighbours
- A permanent sedimentation pond will catch and filter stormwater runoff from the Great North Rd Interchange.
SH16 Causeway upgrade
For more information see the SH16 Causeway upgrade project summary page.
Construction start: Early 2013
Construction finish: Early 2017
Key features
- Widening and raising 4.5km of causeway between Whau River and Great North Road interchange
- Monitoring of plants and wildlife in the Motu Manawa (Pollen Island) Marine Reserve
- Upgrading the Rosebank and Patiki Interchanges
- Adding lanes to the Northwestern Motorway to match the capacity of the Waterview Connection tunnels and provide for the future population growth
- Improving the cycleway alongside the motorway
- Widening and extending the bus shoulder lanes in both directions
- Providing stormwater treatment.
Benefits
- Raising the causeway will help to eliminate motorway flooding at especially high tides
- More lanes to boost capacity and relieve congestion
- Improved stormwater run-off treatment
- Faster and more reliable bus services.
Pre-construction causeway trial
Key features
- Starting testing work for the causeway upgrade alongside SH16 between Great North and Rosebank/Patiki Road interchanges
- Work will trial the soil improvement methods needed to carry out the larger causeway upgrade project starting in 2013
- Temporary causeway will be built – 50m long and 1.5m higher than existing causeway - to carry out soil tests and monitor the marine environment.
Milestones
- Construction starts: 9 January 2012
- Construction finishes: late 2012
- Motorway bus shoulder lanes closed to provide construction access
- Drilling tests and monitoring of the marine area.
Environment
- Focus on monitoring the surrounding marine reserve, plants and wildlife
- Minimising the impacts of building the causeway
- Continuous testing will take place to check impacts on the environment
- Cofferdam in place to protect work area from incoming tides
More information
- Graphic of causeway trial (PDF, 390KB)
- NZTA begins environmental trial for Northwest Motorway upgrade (Media statement 17 January 2011).
- SH16 Te Atatu Interchange and Causeway upgrade projects presentation - 13 August 2012 (PDF, 4MB)
- New pedestrian and cycle bridge over the Northwestern Motorway (SH16)
- Connects Manutewhau Walk Reserve in West Harbour to the Westgate Shopping Centre in Massey
- The bridge is 209 metres long, 3 metres wide and curved in shape
- Includes ramps at each end of the bridge for mobility users
- Provides a safe, new route over the motorway for pedestrians, cyclists and local schoolchildren travelling to Westgate Shopping Centre from the nearby suburbs
- Provides direct access to the shopping centre, libraries and the developing town centre
- Features special lighting to highlight the bridge, improving safety at night
- Enhancements of the reserve include landscaping and replacing old pine trees with native plants and trees
- The bridge will be painted yellow, complementing the nearby yellow Clarks Lane Pedestrian and Cycle Bridge, also designed by Jasmax
- Yellow LED buttons will illuminate the piers and handrail on the bridge
- New street lights will be installed at the end of the shared pedestrian/cycle path
- NZTA starts work on safer access over motorway at Westgate (media release from 28 February 2012).
- Westagate pedestrian and cycle bridge project update - December 2012 (PDF, 2.70 MB)
- SH16 Westagate pedestrian and cycle bridge fact sheet (PDF, 769KB)
- Half diamond interchange that will connect SH20 Mt Roskill Extension to the SH20 Waterview Connection
- Maioro Street realigned and extended north to a new signalised intersection with Stoddard Road
- Eventually the interchange will be developed into a full diamond layout with ramps for both north and southbound traffic
- Design accommodates any planned expansion of SH20 in the future from four to six lanes
- Creates a seamless connection between the existing and future Southwestern Motorway
- Local connections and motorway access established for residents of New Windsor, Mt Roskill and Wesley
- Semi-permanent stormwater treatment pond collects and treats motorway runoff
- A further section of SH20 cycleway added to take cyclists from Ernie Pinches Footbridge through to Maioro Street
- Additional landscaping and trees throughout the interchange
SH16 Westgate Pedestrian and Cycle bridge - completed
Construction start: February 2012
Construction finish: January 2013
Cost: $6 million
Contact us
(Click on an image to see a larger version.)
Bright new NZTA link improves community safety in Auckland (31 January 2013)
Walkers and cyclists now have safer access across Auckland's busy Northwestern Motorway (State Highway 16) with the official opening today of the Westgate Pedestrian and Cycle Bridge by the NZ Transport Agency and Auckland Transport.
Key features
Benefits
Urban design & the environment
Resources
SH20 Maioro Street Interchange
Construction start: May 2010
Construction finish: March 2012
Cost: $40 million
Key features
Benefits
Urban design, environment and public transport
