I don't know if this comes under signs placed in the "right-of-way", but here is another one that reappears year after year: Some space or computer camp. Corner of High Street and # Second.
I see signs like this all over town: hiring nurses, Student Painters, buying houses, matrasses for sale, etc. If you tell me that signs like this are legal, then I will shut up. Also, opposite the exit for Menard's on Liberty Drive, there is a whole forest of signs with services being offered. This particular sign for S.O. Industries is on the corner of High Street and E Second, but there are more of them on the east side.