Contractors on Wellington's Transmission Gully roading project are taking legal action against Waka Kotahi.
Waka Kotahi confirmed legal proceedings have been taken by CPB Contractors and Heb Construction Joint Venture over ongoing expectations to finish the project.
Brett Gliddon, general manager of transport services, said the road has been open to the public since March last year and continues to provide good service and regional resilience, however, it remains incomplete.
"There are works required to be completed per the project's contracted standards," Gliddon said.
"CPB Contractors and HEB Construction Joint Venture (CPBHEB JV) have lodged legal proceedings against Waka Kotahi in response to our ongoing expectations that it complies with these obligations."
The alleged unfinished works include a new State Highway 59 connection between Mackays Crossing and Paekākāriki as well as a recreational track and completion of quality assurance tests.
Gliddon said commercially sensitive conversations have been ongoing over the last year on these matters and Waka Kotahi intends to defend itself in court.
"We will manage the Crown's interests and defend these proceedings while continuing to hold the contract parties accountable," he said.
"Waka Kotahi requires contractual obligations to be met by contractor Wellington Gateway Partnership (WGP) and its construction sub-contractor CPBHEB JV. There is disagreement about the outstanding work and the standards required to be met for the project to be finished in accordance with the contract."
Waka Kotahi said it's working closely with Ventia and the Wellington Gateway Partnership to ensure the highway is maintained and kept safe for road users. Public access to the highway will not be affected and current planned works on the project are expected to continue.