Numbered highways in Michigan are officially known as 'Trunk Lines.' How did they gain that silly name what exactly does it mean?

The name is European in origin. Highways in England, Ireland, France and Sweden are known as Trunk Roads. The 'trunk' name is much less common in the United States with only three states, all in the upper Midwest, that call their highways Trunk Lines - Michigan, Wisconsin and Minnesota.

Officially, all the roads maintained by the State Department of Transportation (Interstate, US and State highways) are known as the Michigan State Trunkline Highway System.

The system dates back to 1913 and today includes 9669 miles of roads across the state.

Even though no one ever calls Michigan highways trunklines, know that's what you're officially traveling on as you drive around our peninsulas.

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