You should see the BIG friggin' electronic signs we purchased for road conditions/amber alert (I'm in Omaha). If you've ever driven out of Denver towards the mountains and have seen the road condition signs, we have those. I'm sure they weren't cheap.
The signs laid on the side of the road for ~6 months before they were installed because the Department of Transportation poured the wrong type of footings. I have yet to see these signs in use. But smile, you help us pay for them.