SH2 Napier to Gisborne needs serious upgrades.
You just get up to 100kph and then have to drop back to 45kph for a corner (heaps of times)...
Wairoa to Gisborne is bad with slumped roads giving quite a bit if rock-n-roll.
Also there are heaps of logging trucks that come off side roads and flick stones at your windscreen.