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The ramps on and off the Northern motorway, known as the Millwater/SHI interchange, are nearing completion.
An official opening for the interchange is to take place next week, on May 13.
The ramps are to facilitate access and development to Millwater, the future commercial area at Highgate, and surrounding areas. They are also expected to reduce congestion on Hibiscus Coast Highway.
Work began 15 months ago, with the cost shared between local developers WFH Properties and Highgate Development.
Construction of the ramps was a condition imposed by the former Rodney District Council upon WFH Properties, before stage three of its development could occur. WFH Properties then signed a Memorandum of Understanding with Clayton Reid, owner of the Highgate Business Park, which included covering part of the cost.
The ramps were also seen as crucial in obtaining consent for the development of the Peninsula Golf Club land in Whangaparaoa by PLDL and restrictions were placed upon how many properties could be constructed there prior to the building of the ramps in order to mitigate traffic congestion.
The project was budgeted to cost $16.9 million, but geotechnical conditions, weather and traffic controls pushed this out to $17.2 million.
The NZ Transport Agency worked with the developers and Auckland Transport in the planning and design of the ramps and associated road connections as well as ensuring they complied with standards. The Transport Agency is responsible for operation and maintenance.
The interchange includes an off ramp from the western side of State Highway 1A to Wainui Rd, an upgrade and widening of Millwater Parkway from Bankside Rd to the Wainui Rd overbridge, and an on ramp to SH1A from Millwater Parkway at the intersection with Timberland Drive.
