I agree that we need to look at future transportation solutions. As Texas grows we are going to be faced with logistical difficulties. It is going to take longer and cost more to travel, expand, and maintain our highway system. With that said I also see the difficulties of high-speed mass transportation in Texas. We grow out a lot more than US cities with decent public transportation. We can't compare Texas cities to the east coast. It is an apples to oranges comparison.
I think looking at things such as high-speed rail is actually short sighted. When did we become people that were satisfied with copying Europe and Asia? I don't want to copy China. I want to out do them. I think we should look at other options such as Virgin Hyperloops. I loved flying on Virgin American Airlines, before they merged with Alaskan airlines. They are a top notch organization. Virgin is actually proposing a hyperloop line from DFW to Laredo. They travel at 600 mph. You will be able to get off at stations along the loop. It will take less land then a high-speed rail, so less eminent domain issues.
There are solutions to urban transportation which I agree is an issue with any non-automobile form of travel such as the Boring Company loops, etc.
Here are some links:
https://virginhyperloop.com/experiencehttps://virginhyperloop.com/project/texashttps://www.boringcompany.com/loop