 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 <unk> Street M @-@ 122 curved around to the east near <unk> Street . The highway ended at the State Ferry Docks on the southeast side of the city next to the Coast Guard station . 
