Yesterday I saw a "Senior Alert" on the CDOT sign on I-25. I wondered what the hell that was, and remembered to look it up today. Apparently, there are a lot of different "alerts," but they must be pretty rare because I had never heard of any of them.
Here is a link to the Senior Alert page on the CBI page, you can see the rest of them in the navigation bar on the left.
https://www.colorado.gov/pacific/cbi/senior-alert
Looks like there are the Amber Alert
Blue Alert
Developmental Disabilities Alert
Medina Alert
News/Media Alert
Senior Alert
And now you know.