Arkansas doesn't even like *55. It on the maps, but there are NO signs.
Funny, I was up in Joplin, and passed the multiple MoDOT dynamic messaging signs along I-44. Low and behold, *55 for highway emergencies. And, "Don't let friends drive drunk, MoDOT Cares", and something about putting children in a car seat, and something about remembering truckers (I went back and forth on I-44 in the Joplin area over a 48 hour period).
Why can't AHTD do this? Not to mention the Amber Alert system... Or the Morgan Nick Amber Alert System here in Arkansas.
It's funny... SDDOT installed a bunch of these signs along I-29 & I-90, and they said if they post too many messages on the signs, the people will ignore it (this was after a winter storm, and SDDOT didn't post weather conditions). Quite the contrary. I love reading the MoDOT signs. And the reminders are just that.