LEILA FADEL, HOST:
Good morning. I'm Leila Fadel. You know those funny messages on electronic signs on the highway, like Massachusetts' Use Yah Blinkah (ph)? Well, they're now banned. The U.S. Federal Highway Administration says no joking around. And they're giving states two years to get rid of, quote, "messages with obscure or secondary meanings." The agency says it's to make sure drivers don't get distracted, but maybe the agency just can't take a joke. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.