Great Lakes Megalopolis the Chicago-Rochester corridor, starting at the Detroit River but continuing east beyond Lake Ontario along the St. Lawrence Seaway to Quebec City and the Gulf of St. Lawrence. Several corridors have interstate highways but no comprehensive passenger rail service. These highway routes pass through both core and fringe areas of the Great Lakes megalopolis. The upper Great lakes region has a marine corridor that connects Lakes Superior, Huron, and Michigan. However, this route does not include parallel Amtrak passenger rail or interstate highway service. I-70 follows the southern fringe of the megaregion. It runs from Kansas City MO to just
SS City of Milwaukee navigation of the vessel took place. There is also a small pilot house on the stern that is used for docking the vessel. The ship was built in 1930 and launched in 1931 at Manitowoc, Wisconsin to replace , which sank with all hands on October 22, 1929 during a gale. Car ferry service had been introduced to the Great Lakes in 1892, and there was many as 14 vessels operating on the lakes at the system's peak. These specialized vessels were capable of carrying up to 34 railroad cars across the often stormy and ice-packed lakes at any time