M-239 (Michigan highway)

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.

M-239
M-239 highlighted in red
Route information
Maintained by MDOT
Length	1.136 mi[1] (1.828 km)
Existed	1963[2][3]–present
Major junctions
South end	SR 39 south of New Buffalo
North end	I-94 near New Buffalo
Location
Country	United States
State	Michigan
Counties	Berrien
Highway system
Michigan State Trunkline Highway System Interstate US State Byways
← M-231 → M-247

Route description

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 Harbor Country Drive, continues to the northwest and into New Buffalo, providing access to US Highway 12.^[4][5] 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.^[6] No section of M-239 is listed on the National Highway System,^[7] a network of roads important to the country's economy, defense, and mobility.^[8]

History

M-239 always ended at I-94, even though Harbor Country Drive 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-long (1.8 km) stretch of LaPorte Road^[a] was designated as M-239 in 1963 to carry traffic to SR 39, which connects to the Indiana Toll Road.^[2][3] 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.^[10][11] That year, the highway carried more than 15,000 vehicles a day.^[12]

Major intersections

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

mi[1]	km	Destinations	Notes
0.000	0.000	SR 39 south to Indiana Toll Road – La Porte	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

• Michigan Highways portal

Notes

1. LaPorte Road was renamed to Harbor Country Drive in 2009.^[9]