If we do go with bilingual signs, I really hope we get a better design than what we currently have.
The Expressway signs of are a classic example, is Te Ara Puke the name of this expressway, or the name for an expressway? The sign doesn’t provide that information.
This already happens.
Many years ago I called the ambulance while driving along a short section of highway that everyone in the region just calls “the bypass”. They asked me if it was suchandsuch road. I literally had no idea. I’ve called it “the bypass” since its existence. I had to describe to the operator, while driving, where we were so they could find it on a map.