The Utah Transit Authority signifies bus routes with colors coded to the frequency of the line

This sign was in their public office--lost and found + transit pass sales--on in Downtown Salt Lake City.

This is a typical bus stop sign. The green sub-sign for the route = the 15 minute frequency, although this is also noted on the sign specifically.

And the system map depicts bus lines by colors linked to frequency information. (Although I think they should make the colors denoting frequency the same for both the signs and maps.)