In my experieince city bound traffic is looking to avoid the roadworks near Kirkbride, so are travelling to get on the motorway via Puhinui Road. They have widened the roundabout on Puhinui Road, although Puhinui is still single lane so whilst more traffic can use the roundabout, there is no extra lanes to go when they exit the roundabout. They've also put signs up to direct traffic past DHL & the NZ engineering building, but this has just spread the problem and fixed nothing....I was leaving Domestic a month ago at 430pm on a Thursday and traffic was backed up from the domestic drop-off all along Puhinui to the motorway. The roading infrastructure around the airport is no where near appropriate for the current volumes (which are forcast to grow even more)