Portal:Michigan highways/Did you know/April 2014
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![M-39 crossing the River Rouge](http://upload.wikimedia.org/wikipedia/commons/thumb/a/af/River_Rouge_Dearborn.jpg/100px-River_Rouge_Dearborn.jpg)
- ... that M-39 (River Rouge crossing pictured) is better known as the Southfield Freeway?
- ... that M-95 has been named for Leif Ericson, the Norse explorer?
- ... that until it was renumbered in the 1930s, M-99 used to be M-9?
- ... that M-553 used to be County Road 553 in Marquette County?
- ... that the eastern and western ends of M-21 were replaced by different Interstate Highways?