The agency, which is part of the U.S. Department of Transportation, said signs should be “simple, direct, brief, legible and clear” and only be used for important information such as warning drivers of crashes ahead, adverse weather conditions and traffic delays. Seatbelt reminders and warnings about the dangers of speeding or driving impaired are also allowed.

Among those that will be disappearing are messages such as “Use Yah Blinkah” in Massachusetts; “Visiting in-laws? Slow down, get there late,” from Ohio; “Don’t drive Star Spangled Hammered,” from Pennsylvania; “Hocus pocus, drive with focus” from New Jersey; and “Hands on the wheel, not your meal” from Arizona. 

What? No! Let’s fight it!

https://www.cbsnews.com/amp/boston/news/funny-highway-sign-messages-going-away-massachusetts/
https://www.wsj.com/lifestyle/travel/highway-safety-signs-jokes-transportation-crackdown-c8fa2bca