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Interstate 75 or I -75 is an Interstate Highway in the U.S. state of Michigan. The highway is the main north-south link in the state, running from the Ohio border at Erie through Detroit and Flint to the Canadian border at Sault Ste. Mary. The route is 637 kilometers long.
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Detroit I-75 / Chrysler Freeway.
Just north of the Ohio city of Toledo, Interstate 75 crosses the Michigan border in Ohio. The highway here has 2×3 lanes and runs parallel to the west bank of Lake Erie to the north. You pass the town of Monroe and US 24 runs parallel to I-75. North of Monroe, Interstate 275 branches off, forming a western bypass of the Detroit metropolitan areawhile I-75 passes through downtown. However, I-275 cannot be used as a full bypass because the Pontiac area lacks a connection to I-75 north of Detroit. After this, the road retains 2×3 lanes and arrives at Rockford, the first suburb 30 kilometers from downtown Detroit. You then pass through the southern suburbs.
From the suburb of Taylor, Interstate 94 runs parallel to I-75 for some distance, which curves northeast here. This portion of I-75 is called the Fisher Freeway, and it widens from River Rouge to 2×4 lanes. One then reaches the city of Detroit itself. I-75 here gives access to the Ambassador Bridge, a major bridge to Canada, as the Canadian city of Windsor is just across the Detroit River. From here, I-75 also has a parallel runway system with 10 lanes in total.
One then comes closer to downtown, with I-75 leading through Detroit’s urban prairie, a largely vacant area where many homes have been demolished. This is where Interstate 96 ends at I-75. I-96 comes from the capital Lansing and Grand Rapids. The parallel track system continues for a while and then one crosses State Route 10, the Lodge Freeway coming from the suburb of Southfield. You will then come with 2×4 lanes along the center, where the skyline is visible from the highway. On the north side of downtown, I-75 turns north. Straight ahead is SR-3, a major high street, Gratiot Avenue. To the south goes the short Interstate 375, which opens up the east side of downtown.
I-75 then proceeds north in 2×4 lanes through a semi-urban area of industrial and office parks. The highway here is called the Chrysler Freeway. A few kilometers later you cross Interstate 94. You then again pass through residential areas with many empty lots. At Highland Park one crosses the State Route 8, the Davison Expressway. The major intersecting streets are one mile apart and are successively called 5 mile, 6 mile and 7 mile road. One of the main underlying roads is the 8 Mile Road, which separates Detroit from the suburbs and is therefore an important cultural divide between the run-down and poor neighborhoods of Detroit and the more affluent suburbs to its north. After this, I-75 still has 2×4 lanes and it crosses a few smaller suburbs. A symmetrical stack interchange crosses Interstate 696, which forms an east-west route through the first row of suburbs.
North of this interchange, the road narrows to 2×3 lanes and passes through the suburb of Madison Heights and later Troy. The further one gets from Detroit itself, the more prosperous the suburbs are. You pass the General Motors and Chrysler factories, which are located in and around the suburb of Pontiac. In Auburn Hills, one crosses State Route 59, a short east-west highway from Pontiac to Sterling Heights, a large suburb. From Pontiac, 2×4 lanes are available again, but this will last for only a few miles, after which the road narrows again to 2×3 lanes and I-75 veers northwest. After Waterford you leave the Detroit metropolitan area after 110 kilometers.
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After Detroit, 2×3 lanes are still available as the next larger town of Flint is not far away. One passes through slightly hilly and wooded area. You soon reach Flint, between the last suburb of Detroit and Flint is only about 25 kilometers. Flint is a larger city with 125,000 inhabitants. On its south side, Interstate 475 branches off, forming an eastern bypass of Flint. After this, the road narrows to 2×2 lanes as I-475 leads downtown and I-75 goes along the west side of Flint. A little further on, US 23 merges, a full-length freeway that forms a long 90-mile bypass well west of Detroit and is of interest to through traffic from Toledo.towards the north. After this, I-75 again has 2×3 lanes and at the airport of Flint you cross Interstate 69, the highway from Indianapolis and Lansing towards Port Huron on the Canadian border. It then passes through Flint’s western neighborhoods and rejoins Interstate 475 on the north side of town. Then they leave the town of Flint.
I-75 is then provisionally double numbered with US 23. You then pass through a rural area with a road network in a grid pattern with a lot of ribbon development. The highway still has 2×3 lanes here. The next town Saginaw is not much further on, about 40 kilometers after Flint. Interstate 675 turns off here to take a short route through the city, while I-75 passes east of the city. You then arrive at Bay City, a town on Saginaw Bay, a bay in the immense Lake Huron. Here one crosses US 10, a longer highway to the towns of Midland and Clare. I-75 then has 2×2 lanes left and the long quiet journey north begins.
One passes through mostly agricultural land parallel to the west shore of Lake Huron. US 23 then exits at Standish to run right along the shore, as I-75 turns northwest from Lake Huron. The road has a fairly wide median strip with trees. The exits are already a lot further apart in this area. There are no longer any large towns here and the highway becomes a lot emptier as you progress north.
The Mackinac Bridge.
Near the town of Grayling, US 127 terminates on a long-haul highway from the Lansing and Jackson region that forms a north-south link across central Michigan. They are now 300 kilometers north of Detroit. Interstate 75 then runs north across the center of the Michigan peninsula. One then reaches the north side of the peninsula, where Lake Michigan and Lake Huron meet at the Straits of Mackinac. Across this street is an 8-kilometer long Mackinac Bridge, a colossal suspension bridge to the Upper Peninsula.
One then enters the Upper Peninsula of Michigan, which lies between Lakes Michigan, Huron and Superior. Immediately after the bridge, US 2 turns off, heading towards Gladstone, through a sparsely populated area. I-75 continues to run north. The peninsula is quite densely forested, with the Hiawatha National Forest. The passage over the peninsula is about 80 kilometers long and leads through sparsely populated areas. One then reaches the twin town of Sault Ste. Marie, who is also in Canada. Via the 2-lane Sault Ste. Marie International Bridge, one crosses the border into Canada and joins the Trans-Canada Highway, which leads further northwest and east into Ontario.