Kapiti Coast District Council's involvement with the Mackays to Peka Peka Alliance had been well worthwhile, deputy mayor Janet Holborow said.
Ms Holborow, a guest speaker during a ceremony held on the new Waikanae River bridge on Thursday morning to mark the completion of the expressway, said council's involvement in the expressway project "can't be understated".
"After some initial resistance for the project in favour of the long planned Western Link Rd, the council and in particular the mayor at the time, Jenny Rowan, and chief executive Pat Dougherty, realised it was critical to work with the Transport Agency and its partners to achieve the best possible outcome for the district, realising potential benefits as well as minimising the impacts.
"They made the decision to work to bring the community alongside the project to ensure local aspirations were at the heart of decision making.
"Joining the Mackays to Peka Peka Alliance enabled us to influence design decisions that would have a long last impact on our community.