SH1 Transmission Gully is now open, providing a safe, modern and reliable route in and out of Wellington.
Built to demanding specifications, this road will be safer and more reliable for motorists, and better able to resist and recover from earthquakes and storms.
The project is highly complex with difficult and steep terrain requiring large-scale earthworks during construction. Twenty-five new structures equating to a total length of more than a kilometre have been constructed along the route. The largest of these, Te Ara a Toa (Bridge 20) over Cannons Creek, stretches 230 metres in length and sit 60 metres above the valley floor.
The $1.25 billion Transmission Gully motorways being delivered as a Public Private Partnership (PPP) – the first roading project to be delivered in this way. The Government’s PPP contract is with Wellington Gateway Partnership. This project is a key part of the Wellington Northern Corridor and is one of the most significant pieces of new road construction in New Zealand.
The Transmission Gully motorway will:
