 The roadway was removed from state maps after 1991 but remains under state maintenance as an unsigned trunkline listed as either M-155 or Old M-155.OLD M-155 begins in front of the former state hospital on High Hillcrest Drive and runs north and northwesterly through a field and out of the property.The road passes some houses in the area as it curves onto Country Farm Road next to Sanatorium Lake, turning northward.