The population is coming off the city limit signs
State DOTs have started dropping population counts from city limit signs. The ones still standing keep their numbers until the sign wears out, and then that's it.
Stories
Road signs, small towns, and why the number on your hometown sign is probably wrong.
Why your hometown sign is green and not some other color
Green isn't a design choice. It's a federal color code, and it means one specific thing: this sign is here to help you, not to boss you around.