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After an intersection with the Homestead Extension of Florida's Turnpike and an interchange with I-595 and the Sawgrass Expressway (SR 869), the Interstate leaves the Miami metropolitan area and turns westward to travel through the Everglades along the tolled Alligator Alley, which brings the highway to the Gulf Coast and Naples, where it again heads north. I-75 starts at an interchange with SR 924 and SR 826 on the Hialeah– Miami Lakes border in suburban Miami. Marie, downriver from Lake Superior, 1,786.5 miles (2,875.1 km) from its origins near the subtropical Atlantic Ocean. Farther north, I-75 approaches the Canadian border at Sault Ste. I-75 runs northeasterly along the Lake Erie shoreline and Detroit River into the city of Detroit before turning northwesterly and northward to the Mackinac Bridge where the freeway crosses the strait between Lakes Huron and Michigan. In Ohio, the highway runs up the western side through Dayton and Lima before crossing into Michigan north of Toledo. I-75 crosses Kentucky, passing through Lexington before crossing the Ohio River into Cincinnati, Ohio. Farther north in Georgia, I-75 continues on through Macon and Atlanta before running through Chattanooga and Knoxville and the Cumberland Mountains in Tennessee. The highway runs the length of the Florida peninsula from the Miami area and up the Gulf Coast through Tampa. I-75 passes through six different states. It is the second-longest north–south Interstate Highway (after I-95) and the seventh-longest Interstate Highway overall. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from State Road 826 (SR 826, Palmetto Expressway) and SR 924 (Gratigny Parkway) on the Hialeah– Miami Lakes border (northwest of Miami, Florida) to Sault Ste. Interstate 75 ( I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. Canadian border on Int'l Bridge at the Sault Sainte Marie Border Crossingįlorida, Georgia, Tennessee, Kentucky, Ohio, Michigan