M-72 (Michigan highway)
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M-72, is a state highway in the U.S. state of Michigan, running from Lake Huron to Lake Michigan across the northern part of the Lower Peninsula. It became a coast to coast highway by 1947, and portions of the road have been relocated and improved since then. It is one of only three Michigan State Highways that cross the entire lower peninsula.
The total length is 133.8 miles.
The first route designated as M-72 was in the 1920s and ran from just south of Lincoln east to Harrisville and then south along Lake Huron shore to Greenbush. In 1923, it was extended west to end southest of Barton City. Around 1927, the route was extended south to Oscoda and west through Luzerne to just east of Roscommon.
In 1936, the portion of M-72 along the shoreline between Oscoda and Harrisville became part of US 23. In 1940, the route is extended westward through Grayling to just south of Kalkaska. A seven mile long discontinuous segment of highway some 45 miles west of Kalkaska near Empire is also designated as M-72. In 1946, the western segment is extended east into Traverse City. In 1947, the two segments are joined and the road now extends "shore to shore" from Lake Huron to Lake Michigan.
From 1947 onwards, the endpoints of the route have remained the same, although there have been realignments of the route in between.
Counties traversed
Junctions
- M-22 in Empire and Traverse City. M-22 duplexes with M-72 for a short distance until M-22's terminus in Traverse City.
- US 31/M-37 in Traverse City. These three highways will triplex through town before M-37 turns north to the Old Mission Peninsula. US 31/M-72 will continue duplexed until Acme.
- US 131/M-66 a duplex through Kalkaska. M-66 will continue with M-72 for a brief duplex south of Kalkaska.
- M-93 west of Grayling.
- BL I-75 in Grayling.
- I-75 south of Grayling.
- M-18 west of Luzerne.
- M-33 a duplex from Mio to Fairview.
- M-65 near Curran
Termini
Western terminus
The western terminus of M-72 is in Empire at M-22.Eastern terminus
The eastern terminus is in Harrisville at US 23.External links
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