What is Car sharing models ? It's simple and could be the best use of this technology. Make all the US superhighways major and key corridor stretches hyperloop. Enabling you as a driver to get around the country faster saving energy and time.
I like the idea of transporting cars with passengers or just cars/SUVs. That would be ideal. Travel from point a to point b like a ferry. Or extension of our current super highway network. Use your personal transport machine after arrival. In most of the USA when traveling outside the dense urban areas driving a automobile is the preferred form of transportation. It would make the world a smaller place much like how cars and paved roads did 100 years ago. If we could hyper transport our vehicles at large chunks of distances say 300+ mile integers. I could only imagine this future.
Freight shipping would greatly benefit. Build a freight tube only across the US mainland. Amazon Prime? Same day delivery.