 = M @-@ 122 ( Michigan highway ) = 
 
 M @-@ 122 was a state trunkline highway in the US state of Michigan entirely in the city of St. Ignace . The highway connected US Highway 2 ( US 2 ) to the State Highway Ferry Dock used before the Mackinac Bridge was built . It was retired and the road returned to local control in 1957 . 
 
 = = Route description = = 
 
 Prior to the opening of the Mackinac Bridge , travelers wishing to venture from St. Ignace to Mackinaw City had to do so via ferry . M @-@ 122 began at US 2 ( now Business Loop Interstate 75 ) near Straits State Park and traveled through town along Ferry Road where it ran southeasterly from the main highway . East of Hornbach Street M @-@ 122 curved around to the east near Paro Street . The highway ended at the State Ferry Docks on the southeast side of the city next to the Coast Guard station . 
 
 = = History = = 
 
 M @-@ 122 was initially assumed into the state highway system in 1929 as a connector between US 31 and Straits State Park . In 1936 , US 2 was routed into St. Ignace and US 31 was scaled back to end in the Lower Peninsula in Mackinaw City . M @-@ 122 now provided a connection between US 2 and the new docks on the southeast side of the city . It existed in this capacity until 1957 when the Mackinac Bridge opened to traffic . 
 
 = = Major intersections = = 
 
 The entire highway was in St. Ignace , Mackinac County . 
 
 