Traveling rural roads through Minnesota is easier than in most states because every Minnesota county has a numbered route system.
Numbers are unique only within a county.
Construction and maintenance of a CSAH is funded partially from the Highway Users Fund that is derived from the state gasoline tax, while County Roads are funded strictly from local county funding sources. This extensively numbered county highway system provides an additional navigational aid using secondary routes throughout the state, with the only problem being that numbers tend to change at the county line. Contrary to popular belief, Ramsey County does not have lettered county routes. These street names are vestiges of an old numbering system that was revised by around 1960. Both the square white and pentagonal blue county signs are depicted in this way at freeway exits and expressway junctions.