Traffic congestion and heavy traffic flows were creating challenges at a key State Highway One intersection at the northern entrance to Whangarei city.
United Civil Construction was awarded the contract to construct a new 1.5km section of State Highway 1, 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 Whangarei’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 and ensure they understood every step of the project.
- The works included a new 1.5km section of State Highway 1, two signalised intersections and a railway crossing. Additional features included a 140m long bored pile reinforced concrete retaining wall up to 5m in height, and 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.
- Landscaping was a significant factor of the project, with over 63,000m2 of urban landscaping undertaken.
- The project involved the extensive construction of new services and the relocation of existing services.
- United Civil provided alternative pavement solutions which included the construction of premixed cement-treated aggregates and the use of SMA surfacing at intersections.
The $15 million project was successfully completed on budget and four months ahead of schedule at the request of the client in order to be open before the Rugby World Cup in September 2011.
The project spanned a two-year period.