Website”. 2012年11月3日閲覧。 ^ “Railroads Operating in Michigan” (PDF). MichiganDepartmentofTransportation. 2008年2月15日閲覧。 ^ Commuter rail plan to Detroit gets
States DepartmentofTransportation (2009). Manual on Uniform Traffic Control Devices (2009 ed.). p. 456 ^ United States DepartmentofTransportation (2009)