From the NZTA via this evening’s WCB meeting briefing docs:
“In response to the feedback received from the community it has decided to bring forward planned re-sealing work on the northern section of the Expressway to the beginning of the next construction season, and to use a low-noise surface material for the second seal.
“The material to be used will be an Open Graded Porous Asphalt (OGPA) or equivalent — the same as the surface of the rest of the Expressway. OGPA is one of the quietest running surfaces available in New Zealand. It helps to reduce both noise and surface spray. The Agency has carefully considered the option of bringing this work forward further, but if asphalt is laid on top of the existing chip seal surface before the pavement has properly settled, there is a risk that the new asphalt could break up over winter, requiring additional work in the future.
“While the exact timing of the resealing work will be weather dependent, the aim is to apply the low-noise surface as early as possible in the Spring 2017 construction season.
“The areas which will be resurfaced with OGPA in the next construction season are the main alignment sections that are currently chip sealed. Close monitoring of noise levels adjacent to the Expressway will continue and any concerns raised within the community followed up.
“Operational feedback: We have had positive feedback from the community about the operational Expressway including driver experience, outlook, travel time etc.
“We have also had some specific concerns raised around; Noise Shared pathway Traffic behaviour Surface of Expressway Signage
“We have carried out short and long duration noise monitoring at a number of locations around Waikanae (and the whole alignment) to help draw a picture of the operational noise levels which we will be sharing with the Impact Forum groups and individuals who have raised noise concerns.
“The two tie-ins at each end of the Expressway are due to be completed by mid-May.
“We have another 80,000 plants to plant in May with maintenance and weed control in place for 3-4 years.”