Sad - I thought the ND state route markers were very unique and distinct. Will be a shame when they disappear.
BISMARCK, N.D. (AP) – The profile of a famous Sioux warrior that has adorned North Dakota's highway signs for nearly a century is being quietly replaced by a rectangle. One descendant of Marcellus Red Tomahawk said it "tears my heart out" that officials decided to swap out the markers featuring his great-great-grandfather with versions displaying the nondescript North Dakota outline, an homage to the upcoming 100th birthday of the state's transportation agency.
https://www.mail.com/business/economy/4492080-rectangular-outline-bumps-warrior-north-dakota-sig.html#.23140-stage-set12-4
https://www.aaroads.com/forum/index.php?topic=16858.0