M-34 (Michigan highway)

M-34
M-34 highlighted in red
Route information
Maintained by MDOT
Length	28.938 mi[1] (46.571 km)
Existed	c. July 1, 1919[2]–present
Major junctions
West end	M-99 at Osseo
Major intersections	US 127 in Hudson M-156 in Clayton
East end	Bus. US 223 / M-52 at Adrian
Location
Country	United States
State	Michigan
Counties	Hillsdale, Lenawee
Highway system
Michigan State Trunkline Highway System Interstate US State Byways
← M-33 → M-35

M-34 is an east–west state trunkline highway in the southeastern region of the US state of Michigan. It has a western terminus near Osseo on M-99 and runs through forest and farm lands to its eastern terminus at Business US Highway 223 (BUS US 223) and M-52 in Adrian. The highway serves a number of smaller communities in the area and intersects two US Highways while carrying between 4,200 and 11,300 vehicles on a daily basis.

M-34 was designated and signed with the beginning of the state highway system around July 1, 1919, along a route that extended to either end of its current routing. These western and eastern extensions were added to other highways during the 1920s, shortening M-34 to roughly its current length. A few more changes were made in the mid-1950s and 1960s resulting in the modern routing. M-34 has a short, unsigned sibling, Connector 34, which is better known as Industrial Drive in the Adrian area.