I talk about the nation's first welcome center in Michigan and the Eisenhower Interstate System.

Sources:

https://www.history.com/topics/us-states/interstate-highway-system

https://www.britannica.com/biography/Dwight-D-Eisenhower

https://www.ereferencedesk.com/resources/state-facts/michigan.html

The last one has a bunch of Michigan's first that I did not include in my podcast.