What are the most populated air routes in the USA? Find out and let rails help sans excessive government interference.
Not gonna happen. Many of the most flown routes are from the NE to CA, a good 3,000 miles. That takes something like 5 hours in the air. NYC to LA takes 4 days on Amtrak. (Assuming it runs on time, which if it ever happened would be major news.)
Rail works well in Western Europe, where distances between cities are much smaller.