There are calls for an independent inquiry into the issues surrounding Transmission Gully amid major repairs to fix surfacing issues.
The issues are adding further uncertainty to the troubled project which has been delayed by nearly two years.
Waka Kotahi Transport services general manager Brett Gliddon said repairs are underway for multiple problems.
"There are several issues with both the asphalt and chip seal surfaces which require remedial work," he said in a statement to Stuff.
It's unclear how big the affected area is or how long it will take to fix.
On Wednesday, the Wellington, Porirua, and Kāpiti Chambers of Commerce called for an independent inquiry into the issues.
"This fiasco has gone on too long, it's time for answers, and time for someone to take responsibility and leadership," Chair of the Porirua Chamber of Commerce Hamish Mexted said."We're concerned about the lack of progress, project management monitoring, quality assurance - and we still are yet to have an answer on when the road will open. Where's the accountability? It is time to find out why."
Wellington Chamber of Commerce Chief Executive Simon Arcus said the delay continues "the pattern of failed planning and implementation" for major projects in the region.
"We need to do better - if agencies and government officials can't get it right on the capital city's doorstep, what hope is there for the rest of New Zealand?
"This incredible feat of infrastructure should be open and celebrated, instead it's beleaguered by issue after issue, delay after delay, and met with silence from politicians and agencies who hold the purse-strings and vision."
Chair of Kāpiti Chamber of Commerce Heather Hutchings said residents need certainty.
"Every time the network is down, be it recent tragic accidents to ongoing network issues of flooding, it's costing the region. Kāpiti residents are being let down, Greater Wellington continues to be let down," Hutchings said.
"We need someone to demand answers on timelines and quality - rather than put their hands up and blame the contractual arrangements."
Construction on the 27-kilometre road began in 2014 but has been hampered by delays. It was due to be finished in April 2020, then September 2021, then Christmas. The cost also blew out from $850 million to $1.2 billion.
In December last year Waka Kotahi chair Sir Brian Roche apologised for the delay.
"Really disappointed and actually apologise to the public that we were unable to deliver something they richly deserve, that is just inexcusable at this time of the year."
Sir Roche said the new aim is to have the road open by Easter this year.
"Easter, one would hope that it can be before Easter," he said.
