The Michigan Department of Transportation (MDOT) will be upgrading freeway signs along US-131 beginning July 11th. Most, if not all, are expected to remain green with white lettering.
I know I'm on shaky ground here, but this Sunday it drove me crazy, no pun intended, that there are virtually no speed limit signs posted on M-89, after it veers off west from M-40 in Allegan County.