Portal:Michigan highways/Did you know/February 2012

The "Covered Trail" along US 41 south of Copper Harbor

... that US 41 (pictured) was the state's first Michigan Heritage Route in 1995?
... that before it was signed in 2007, M-121 (Chicago Drive) was an unsigned highway previously part of M-21?
... that the route of M-47 was previously part of US 10?
... that M-94 in Manistique crosses the Siphon Bridge, a structure once described in the pages of the Ripley's Believe It or Not! column?
... that the local nickname for I-194 is "the Penetrator"?