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| M-72 (Michigan highway) | |
|---|---|
| State | MI |
| Route | 72 |
| Length mi | 133.014 |
| Direction a | West |
| Terminus a | Cedar River |
| Direction b | East |
| Terminus b | Empire |
| Counties | Baraga, Houghton, Ontonagon, Iron, Dickinson, Marquette, Mosquito, Delta, Crawford, Kalkaska, Antrim, Grand Traverse |
M-72 (Michigan highway) is an east–west state trunkline highway traversing the northern Lower Peninsula and the western Upper Peninsula of Michigan. The route links rural communities, recreation areas, and industrial centers between the shores of Lake Superior near Houghton and the shores of Lake Michigan near Grand Traverse Bay and Leelanau County. M-72 connects to major corridors including US 41, US 2, US 31, and I-75, serving as a cross-peninsula arterial for freight, tourism, and regional travel.
From its western origin near the Cedar River shoreline in the western Upper Peninsula, the highway proceeds through mixed forest and mining landscape near Keweenaw Peninsula, passing towns such as Houghton and Ontonagon before crossing inland toward Iron County. Eastward, M-72 intersects US 41 and skirts industrial zones tied to historic copper mining and iron mining operations, then continues toward Marquette and Delta County where it meets US 2 near communities connected to the Great Lakes shipping network and the Soo Locks region. Entering the northern Lower Peninsula, the trunkline travels through the vicinity of Huron-Manistee National Forest tracts and recreational areas near Sleeping Bear Dunes National Lakeshore, providing access to Traverse City and linking with US 31 and M-22. The eastern terminus lies close to Empire on the inland side of Lake Michigan, near attractions such as Glen Lake and the Sleeping Bear Dunes corridor.
M-72 was first designated in the early 20th century as Michigan established its state trunkline system alongside contemporaries like US 41 and US 31. Early routing adjustments reflected the boom-and-bust cycles of regional industries including lumbering near Manistee and mineral extraction tied to Calumet and Hecla. The highway saw realignments during the 1920s and 1930s to improve connections to emerging federal routes such as US 2 and to serve growing tourism around Traverse City and Sleeping Bear Dunes National Lakeshore. Mid-century upgrades funded through state programs paralleled infrastructure initiatives associated with figures like Governor Frank Fitzgerald and later transportation commissioners tied to the expansion of Interstate 75. In the late 20th century, M-72’s corridor was influenced by environmental regulatory milestones including actions by the National Park Service and state conservation agencies protecting areas near Leelanau State Park and Grand Traverse Bay. Recent decades have seen modernization projects coordinated with county road commissions and entities such as the Michigan Department of Transportation to enhance safety and freight capacity.
M-72 connects with numerous primary and secondary routes that serve regional and interregional travel. Significant junctions include its links with US 41 in the Upper Peninsula near communities historically tied to Michigan Technological University, intersections with US 2 providing east–west continuity across the Upper Peninsula, crossings with I-75 that integrate the route into the national Interstate Highway System, and terminus connections near US 31 and feeder routes serving Traverse City and Empire. Other notable crossroads include state routes that lead to sites such as Sleeping Bear Dunes National Lakeshore, Leelanau Peninsula AVA, and inland recreation areas near Jordan River Valley.
Traffic along M-72 varies widely by segment: western Upper Peninsula stretches exhibit lower average daily traffic dominated by local commercial vehicles and resource-industry shipments serving lands around Porcupine Mountains Wilderness State Park and historic mining districts like Ontonagon County. Central segments nearer Traverse City and Leelanau County show substantially higher volumes driven by tourism to destinations associated with Sleeping Bear Dunes, Grand Traverse Bay, and regional vineyards such as those in the Old Mission Peninsula AVA. Seasonal peaks coincide with summer recreation, fall color tourism linked to communities like Empire and Glen Arbor, and winter events tied to snowmobiling and cross-country skiing near national and state forests. Freight patterns reflect connections to ports on Lake Superior and Lake Michigan, with commercial vehicle counts influenced by industries operating in counties including Iron County and Marquette County.
Planned and proposed projects affecting M-72 are typically managed by the Michigan Department of Transportation in coordination with county road commissions and stakeholders such as the National Park Service for areas adjacent to protected lands. Anticipated work includes targeted pavement rehabilitation, safety improvements at high-crash intersections near tourist corridors like Sleeping Bear Dunes, and bridge maintenance projects addressing structures over rivers feeding Lake Michigan and Lake Superior. Broader regional initiatives—coordinated with entities such as the Federal Highway Administration and local economic development authorities in Grand Traverse County—may seek to optimize freight movement and enhance resilience to climate-related issues affecting runoff and freeze-thaw cycles in northern Michigan.
Category:State highways in Michigan Category:Transportation in Michigan