kiwiharry: A bit hard to see, but as seen here on Google Street View.
I saw them yesterday on my drive from Auckland to Hamilton as I passed near Drury.
Yep - those are they!
The views stated in my posts are my personal views and not that of any other organisation.
He waka eke noa
Dynamike: A temporary grid of dots painted on the road is used to measure ground movement.
They paint them on my road every summer, so last year I stopped and asked them why.