Portal:Michigan highways/Did you know/April 2020
Appearance
![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-80 serves the Chippewa County International Airport on the site of the former Kinross Air Force Base?
- ... that until it was renumbered in the 1930s, M-99 used to be M-9?
- ... that US 41 is officially the Copper Country Trail National Scenic Byway north of Houghton?
- ... that in 1919, Michigan was the second state to sign numbered highways after Wisconsin?