Expressway design reflects the special character of the Kāpiti Coast and leaves a quality legacy for communities.

The 18-kilometre Mackays to Peka Peka Expressway (M2PP) traverses the Kāpiti Coast, north of Wellington. It is part of the Wellington Northern Corridor project and a Road of National Significance.

Boffa Miskell’s involvement extended over 10 years from the early scoping and feasibility stages, through the planning and consent process, conceptual and detailed design and into the final construction and monitoring phase. Boffa Miskell provided planning, ecology, landscape architecture, urban design and cultural professional services to the project as part of the M2PP Alliance team.

The Boffa Miskell multi-disciplinary team provided critical input and analysis and assessment of route alignment and design options, and in informing public consultation. The team was instrumental in developing the Notice of Requirement, resource consent applications and associated assessments of environmental effects. We presented expert evidence in planning, ecology, landscape planning, landscape design and urban design at the resource consent hearings, including the Board of Inquiry hearings.

Our assessment work was influential in determining the final route alignment, taking into account the effects on ecology, landscape and urban environments, and advice on how to avoid, remedy or mitigate adverse effects.

It is no mean feat to construct a four-lane expressway through established communities and extensive landscape and ecological mitigation measures were required to achieve this in a sensitive manner.

The legacy delivered by the project provides recreational, ecological, cultural expression and open space benefits to the community on a large scale through:

  • 140-hectare of new native planting bordering the Expressway, 10.5 hectares of restored or created wetlands, 6 km of stream riparian planting,
  • 16 kilometres of a shared pathway for cyclists, walkers and horse riders.
  • Quality ‘hard landscape’ components such as the simple clean lines of the bridges, bridge abutment faces, noise-attenuation walls and retaining walls.
  • Expression of iwi and community values through high-quality detailed design and finishes, particularly where pedestrians and cyclists interact with the Expressway at local road underpasses, Waikanae River, and the cycleway.

Worked with

Aaron Brown, Extraordinary Projects
Beca
Fletcher Construction
Higgins
Kapiti Coast District Council
Kauri Park and Natural Habitats
Monk Mackenzie Architects
Te Atiawa Charitable Trust
Te Atiawa ki Whakarongotai and Marae Reservation Trust.
Tuku Rakau Collective: Grace whānau, Ahu Whenua Trust, Takamore Trust, Te Atiawa ki Whakarongotai and the Transport Agency
Waka Kotahi NZ Transport Agency
Warren and Mahoney

Project date

2009 - 2019

Awards

Finalist | NZILA Te Karanga o te Tui Award
Commendation | Supreme Concrete Award | NZCS Awards
Excellence in Community Engagement | New Zealand Engineering Excellence Awards
Teaming Up | GEM Awards
Supreme Winner | GEM Awards

Landscape architecture and urban design services have been integral throughout the project beginning with refinement of the route through conceptual and detailed design phases and construction monitoring.

Collaboration with the Alliance design team and consultation with iwi and the local communities was essential to the design process. The scope of work included:

  • Landscape and visual assessment to identify effects to be avoided, remedied or mitigated. This assisted the final route alignment and supported the Notice of Requirement application.
  • Preparation of urban and landscape design framework and 12 site-specific management plans for certification by Council.
  • Landscape design input to the TOC phase of the project (concept design).
  • Detailed design of wetlands, streams and ecological mitigation measures in collaboration with stormwater management systems.
  • Detailed design of large areas of landscape and ecological mitigation planting.
  • Undertaking extensive consultation with iwi, agencies, local communities, and stakeholders.
  • Detailed design of urban design features and finishes for the 11 road bridges, 5 pedestrian bridges and noise walls.
  • Design and detailing of the 18-kilometre cycle/walk/bridleway parallel to the expressway.
  • Site monitoring of planting and urban design works

From our first involvement with this project, over ten years ago, Boffa Miskell’s approach was very much based on ensuring that the legacy delivered by the project provides recreational, ecological, cultural expression and open space benefits to the surrounding community on a large scale.