BUS US 31 is a business route running through the Pentwater downtown area along a former routing of US 31.
BUS US 31 is a business spur running to the Niles downtown area along a former routing of US 31. It is scheduled for decommissioning in 2006.
BUS US 31 was a business route running through the Holland metropolitan area. The highway was turned back to the City of Holland by the Michigan Department of Transportation so that the city would control and could enhance on-street parking in the downtown area. This decommissioning also removed the Lake Michigan Circle Tour from downtown Holland.