So, how do people in Hawai'i get to other islands without flying, then?
Are there ferries that carry cars or bridges of any sort?

You might think so, but everyone flies. There are hardly any ferries,
and the islands are too far apart for fixed links.

Trivia question (no fair Googling the answer): What was the primary
justification/purpose of the Interstate Highway System?

Military. (Not Googled).

A common misconception. See other recent messages.

R's,
John