I've brought this up a few times. Since it has opened I've only been on that stretch of road a few times where it hasn't had roadworks.Just back from a road trip through the South Waikato and Auckland. Have to say the condition of our roads is appalling and the stretch on the expressway north of Hamilton is a disgrace. There's a major contributor to productivity (lack of) staring us in the face.
And don't get me started on cones.
I can understand at the start where there was the last part to finish off and open.
There is usually work being done on both sides or detours to move you to the other side.
We discussed on here during covid how other countries use more expensive material that lasts longer but it is more of a disruption when it needs to be replaced. The amount of ongoing maintenance we really should be looking at a better solution. Especially for such a heavily used road.