Interstate 75 (
I-75) is a part of the
Interstate Highway System that runs from
Miami, Florida, to
Sault Ste. Marie in the
Upper Peninsula of Michigan. I-75 enters
Michigan from
Ohio in the south, north of
Toledo and runs generally northward through
Detroit,
Pontiac and
Bay City, crosses the
Mackinac Bridge, and ends at the
Canadian border in Sault Ste. Marie. The freeway runs for approximately on both of Michigan's peninsulas. The landscapes traversed by I-75 include
Southern Michigan farmland, northern forests, suburban bedroom communities, and the urban core of Detroit. The freeway also uses three of the state's monumental bridges to cross major bodies of water. There are four
auxiliary Interstates in the state related to I-75, as well as nine current or former
business routes, with either Business Loop I-75 (BL I-75) or Business Spur I-75 (BS I-75) designations.