High Quality Content by WIKIPEDIA articles! M-39 is a state trunkline highway in Metro Detroit area of the US state of Michigan that runs from Lincoln Park, on the south end, to Southfield on the north. Most of it is known as the Southfield Freeway, a freeway that runs from Allen Park through the west side of Detroit to Southfield. The rest of the highway follows Southfield Road, a divided highway in the Downriver area. The official southern terminus of M-39 is at the corner of Southfield Road and Lafayette Boulevard in Lincoln Park, one block southeast of the junction of Interstate 75 (I-75, Fisher Freeway) and two blocks northwest of M-85 (Fort Street). From there the highway heads northward, transitions into a freeway and runs through Dearborn and Detroit. The northern terminus is at M-10 (Lodge Freeway) in Southfield.