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Mackinac Bridge
- ... that when the Mackinac Bridge (pictured) opened, US 27 was extended north across it?
- ... that M-114 was set up as a beltline around Grand Rapids following what are now Wilson Avenue, 28th Street and East Beltline Avenue?
- ... that US 2 and US 141 each have separate segments in Michigan because the highways cross back into Wisconsin for about 15 miles (24 km)?
- ... that M-168 in Elberta previously connected to a car ferry dock?
- ... that US 41 is officially the Copper Country Trail National Scenic Byway north of Houghton?
