So while laudable, it would be very nice if North Carolina followed suit with its ~79,000 miles of maintained roads (largest of any state) [1]. But I doubt that would happen, my friend at NCDOT says the culture emphasizes building new roads (or the ones that get wiped out by hurricanes out on the outer banks), and change intersections in a manner that borders on the whimsical.
We like to build roads in challenging places, it seems [2].
[0] https://en.wikipedia.org/wiki/Iowa_Primary_Highway_System
[1] https://en.wikipedia.org/wiki/North_Carolina_Highway_System