Traffic congestion and heavy traffic flows were creating challenges at a key State Highway One (SH1) intersection at the northern entrance to Whāngārei city.
United Civil was asked to construct a new 1.5km section of SH1 known as Kamo Bypass Stage 2, to widen the existing intersection and create a new connecting route to the North.
This project offered numerous challenges, including managing civil and road works at Whāngārei’s busiest intersection.
As the greenfield section of new highway traversed through a built up residential area, a large focus of the project was engaging with the local community and stakeholders, to keep them informed of progress.
Key features included:
- a new 1.5km section of SH1
- two signalised intersections and a railway crossing
- a 140m long bored, pile reinforced concrete, retaining wall up to five metres high
- an underpass to separate local and bypass traffic and enable property access for residents.
- 680m of noise walls were installed adjacent to residential areas, which along with an OGPA road surfacing, reduced the effects of road noise
- over 63,000m2 of urban landscaping
- extensive construction of new services and the relocation of existing services
- providing alternative pavement solutions, including construction of premixed cement-treated aggregates and the use of SMA surfacing at intersections.
The $15m project was successfully completed on budget and four months ahead of schedule at the request of the client, to be open before the Rugby World Cup in September 2011.
The project spanned two years.