M-100 (Michigan highway)

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M-100 marker

M-100 highlighted in red
Route information
Maintained by MDOT
Length: 12.460 mi[3] (20.052 km)
Existed: c. 1925[1][2] – present
Major junctions
South end: I‑69 south of Potterville
  M‑43 in Grand Ledge
North end: I‑96 near Grand Ledge
Counties: Eaton, Clinton
Highway system
M‑99 M‑101

M-100 is a north–south state trunkline highway in the central region of the U.S. state of Michigan. It runs between Potterville and Grand Ledge, connecting Interstate 69 (I-69) and I-96 west of the state capital, Lansing. The highway was previously a section of M-16. After M-16 was realigned, M-100 was created by 1927. Three extensions in the 1930s, 1950s and 1990s resulted in the current highway routing.

Route description[edit]

M-100 starts at exit 66 on I-69 in Potterville. The highway runs north along Hartel Road, intersecting Lansing Road, the former route of US Highway 27 (US 27) south of downtown. Hartel Road runs due north from Potterville to Grand Ledge. North of M-43 (Saginaw Highway), M-100 follows Clinton Street, jogging northwest along Jefferson Street north of Willow Highway. Crossing the Grand River on Bridge Street, M-100 returns to Clinton Street north of the river. North of town, the roadway is once again known as Hartel Road before changing to Wright Road near the Abrams Municipal Airport. North of Grand River Highway, which is the former route of US 16, M-100 meets I-96 and ends; Wright Road continues to the north of the interchange.[4]

Like other state highways in Michigan, M-100 is maintained by the Michigan Department of Transportation (MDOT). In 2011, the department's traffic surveys showed that on average, 16,626 vehicles travelled along the highway in the city of Grand Ledge and 5,419 vehicles used the highway daily between Potterville and Grand Ledge, the highest and lowest counts respectively.[5] No section of M-100 is listed on the National Highway System,[6] a network of roads important to the country's economy, defense, and mobility.[7]


M-100 was created in 1925 when M-16 was rerouted directly between Lansing and Eagle.[1][2] M-100 started at M-39 in Grand Ledge and ran north to M-16 in Eagle. The highway was extended southward in 1932 to end at US 27/M-78 in Potterville.[8][9] The northern end was extended to meet the US 16 (now I-96) freeway in 1958.[10] The south was similarly extended in 1991 with the completion of the I-69/US 27 freeway south of Potterville.[11]

Major intersections[edit]

County Location Mile[3] km Destinations Notes
Eaton Potterville 0.000 0.000 I‑69 – Charlotte, Lansing Exit 66 on I-69
Grand Ledge 10.314 16.599 M‑43 – Kalamazoo, Lansing
Clinton Eagle Township 12.460 20.052 I‑96 – Grand Rapids, Lansing Exit 86 on I-96
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ a b Michigan State Highway Department (July 15, 1925). Official Highway Condition Map (Map). Cartography by MSHD.
  2. ^ a b Michigan State Highway Department (September 15, 1925). Official Highway Condition Map (Map). Cartography by MSHD.
  3. ^ a b Michigan Department of Transportation (2009). MDOT Physical Reference Finder Application (Map). Cartography by Michigan Center for Geographic Information. http://www.mcgi.state.mi.us/prfinder/. Retrieved January 25, 2008.
  4. ^ Google, Inc. "Overview Map of M-100". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&saddr=M-100+%26+Lansing+Rd,+Potterville,+MI+48876&daddr=M-100+%26+W+Grand+River+Hwy,+Clinton,+Michigan&hl=en&geocode=&mra=pe&mrcr=0&sll=42.710766,-84.739193&sspn=0.320887,0.464172&ie=UTF8&ll=42.710696,-84.742355&spn=0.320887,0.464172&z=11. Retrieved November 15, 2008.
  5. ^ Bureau of Transportation Planning (2008). "Traffic Monitoring Information System". Michigan Department of Transportation. Retrieved June 30, 2012. 
  6. ^ Michigan Department of Transportation (April 23, 2006) (PDF). National Highway System, Michigan (Map). Cartography by MDOT. http://www.michigan.gov/documents/MDOT_NHS_Statewide_150626_7.pdf. Retrieved October 7, 2008.
  7. ^ Natzke, Stefan; Neathery, Mike; Adderly, Kevin (June 20, 2012). "What is the National Highway System". National Highway System. Federal Highway Administration. Retrieved July 1, 2012. 
  8. ^ Michigan State Highway Department (July 1, 1932). Official Highway Service Map (Map). Cartography by H.M. Gousha.
  9. ^ Michigan State Highway Department (October 1, 1932). Official Highway Service Map (Map). Cartography by H.M. Gousha.
  10. ^ Michigan State Highway Department (1958). Official Highway Map (Map). (Includes all changes through July 1, 1958)
  11. ^ Michigan Department of Transportation (1991). Michigan Department of Transportation Map (Map). 1 in.:14.5 mi./1 in.:23 km.

External links[edit]

Route map: Google / Bing

  • M-100 at Michigan Highways
  • M-100 at CanHighways.com