99% of the time those signs are a complete waste. By my, they tell how many miles to the next state border. The state spent millions to tell me absolutely nothing.
More often than not any alerts are long past being necessary by the time they get posted.
The phone emergency alert is another one. I received one a few weeks ago that alerted me to some police action nearby.
Well, if nearby really includes two counties and about 40 miles away, I guess it was important.
I've never seen that on an electronic sign. I do appreciate informational signs like "I 30 - 15 miles, 12 minutes" in Dallas. Much more useful than 'congestion ahead'.
The older I get, the more important it is to know where the next exit is to a bathroom, though.
Those should be standard, LOL!