Boring Company to cut an 18 mile tunnel connecting O’Hare Airport terminals to downtown Chicago.
I'd enjoy an under-Lake link from perhaps Muskegon to O'Hare, not least because it would save a load of time when visiting the relatives in Wisconsin.
Musk comes up with some very simple innovations that end up being key to success. Check out some in the Boring Company FAQ.
https://www.boringcompany.com/faq/