Engineers design roads around traffic speeds - a higher intended traffic speed has ramifications for how the road is designed and built.
Sounds like somebody likes to sit in the left lane at 65, "because it's the legal maximum!"
The end result is, someone was ticketed for speeding-BFD. It inevitably happens to most drivers, and its not the end of the world, especially because if you can afford Glass, you're probably going to be able to afford a ticket. Only on HN do we have people second guessing the entire concept of speed limits, and making all sorts of excuses for something so trivial as a speeding ticket being given out.