Work on gully link starts
Work is under way on the Kenepuru connection for Transmission Gully.
David Low, chief executive of the Wellington Gateway Partnership that is building the highway, said regular users of State Highway 1 just south of Porirua would notice the clearance work had begun.
The main earthworks for the access to build the bridge that will come down next to Porirua Autocrash in Kenepuru Dr would start in the next few weeks, he said.
Construction of that link road is expected to be completed by late 2019.
Low said integrating the new Transmission Gully link with Kenepuru would be challenging.
‘‘We’ve done significant modelling on traffic movements and flows that support the design process,’’ he said.
‘‘Designs of both the bridges [for Kenepuru Dr and one over the main trunk railway line] and earthworks have to take into account SH1, the rail corridor and Porirua Stream.
‘‘We have to work around a live traffic environment and ensure there’s no permanent lane closures throughout construction.’’
Low said the terrain on the eastern side of SH1 was steep and extensive earth-moving was required. There could be reduced speeds in Kenepuru Dr as the link was completed, he said.