M-239 (Michigan highway)

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M-239 marker

Route information
Maintained by MDOT
Length: 1.136 mi[1] (1.828 km)
Existed: 1963 – present
Major junctions
South end: SR 39 south of New Buffalo
North end: I‑94 near New Buffalo
Counties: Berrien
Highway system
M‑231 M‑247

M-239 is a north–south state trunkline highway in Berrien County in the extreme southwestern corner of the US state of Michigan connecting State Road 39 (SR 39) in Indiana to Interstate 94 (I-94). The highway was designated in 1963, and it provided the only connection from the southern end of I-94 into Indiana until 1972.

Route description[edit]

As SR 39 crosses into Michigan it becomes M-239. As soon as it crosses the border, the road curves around to the northwest where it continues through a generally rural area. The trunkline intersects Wilson Road and passes next to a commercial development. After a little over a mile (1.8 km), the road comes to its northern terminus at an interchange with I-94 at exit 1. While M-239 officially ends at the interchange, the roadway, known as LaPorte Road, continues on to the northwest where it heads into New Buffalo.[2][3] Like other state highways in Michigan, M-239 is maintained by the Michigan Department of Transportation (MDOT). In 2011, the department's traffic surveys showed that on average, 6,231 vehicles used the highway daily.[4] No section of M-239 is listed on the National Highway System,[5] a network of roads important to the country's economy, defense, and mobility.[6]


M-239 always ended at I-94, even though La Porte Road continues into New Buffalo. Before completion of the Indiana portion of I-94, the freeway ended at the present exit 1. A 1.1-mile (1.8 km) stretch of La Porte Road was designated as M-239 in 1963 to carry traffic to Indiana State Road 39, which connects to the Indiana Toll Road.[7][8] Until 1972, when Indiana constructed their section of I-94, M-239 and SR 39 were the only connection from the southern end of I-94 in Michigan across the state line.[9][10]

Major intersections[edit]

The entire highway is in New Buffalo Township, Berrien County.

Mile[1] km Destinations Notes
0.000 0.000 SR 39 – La Porte, Indiana Toll Road Indiana state line
1.136 1.828 I‑94 – Detroit, Chicago
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ 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 June 30, 2012.
  2. ^ Michigan Department of Transportation (2012). State Transportation Map (Map). 1 in:15 mi / 1 cm:9 km. Section N7.
  3. ^ Google Inc. "Overview Map of M-239". Google Maps (Map). Cartography by Google, Inc. https://maps.google.com/maps?saddr=M-239+N%2FLa+Porte+Rd&daddr=M-239+N%2FLa+Porte+Rd&hl=en&ll=41.767343,-86.726589&spn=0.030856,0.02914&sll=41.776881,-86.733027&sspn=0.061704,0.058279&geocode=FWA0fQIdBLnU-g%3BFQFvfQIdApfU-g&t=h&mra=ls&z=15. Retrieved July 2, 2012.
  4. ^ Bureau of Transportation Planning (2008). "Traffic Monitoring Information System". Michigan Department of Transportation. Retrieved June 30, 2012. 
  5. ^ 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.
  6. ^ Adderley, Kevin (August 26, 2010). "The National Highway System". Federal Highway Administration. Retrieved January 1, 2011. 
  7. ^ Michigan State Highway Department (1963). Official Highway Map (Map). Section N7.
  8. ^ Michigan State Highway Department (1964). Official Highway Map (Map). Section N7.
  9. ^ Michigan Department of State Highways (1972). Official Highway Map (Map). 1 in:14.5 mi. Section N7.
  10. ^ Michigan Department of State Highways (1973). Official Highway Map (Map). 1 in:14.5 mi. Section N7.

External links[edit]

Route map: Google / Bing

  • M-239 at Michigan Highways
  • M-239 at Michigan Highway Ends