I'd connect the country with high-speed rail and focus entirely on manufacturing, just like China. Lots of cities and towns would pop up along the rail corridors, as in the UK and the first time we built out our rail infrastructure and everywhere else it's been done. The U.S. stopped building new cities around the same time we started adopting automobiles.

Our highway system has enriched incumbent cities and created a nation of gas stations, inexpensive motels, restaurants that serve rapidly prepared food, tire salons, automobile dealerships, and billboards.

Let's build Hyperdrive City, Nebraska, where you can rent an apartment on the 93rd floor of the mall for $200 a month:

https://br.ifunny.co/picture/derek-eedrk-can-we-build-one-of...

Or one of these:

https://www.cnn.com/style/article/chengdu-future-city-design...