The US could have “chosen” to do both (there’s no single policy decision or document to point to), as it had done in its railroad heyday, and as other countries do (e.g. Switzerland, China, Russia, etc.). It was and continues to be a failure of public policy and political system that passenger rail is so bad, and even freight rail is as underinvested in. That’s not a knock on the other forms of transport, all of which form a vital part of a larger interconnected, intermodal transportation network, but rail should be an important trunk of that system given its capacity and efficiency. Yet rail has had the least amount of public financial and policy support. By comparison, the US has invested trillions of taxpayer dollars in building and maintaining millions of miles of publicly owned roads (almost all non-tolled), airports and Air Traffic Control (ATC) system, and seaports, canals, dredged harbors and navigable inland waterways, Vessel Traffic Service (VTS).
>When the fully automated, electric car and buses arrive, I would imagine that passenger rail in the US will disappear entirely except for nostalgia operations and metro systems already in operation. It is much easier to be B2B or B2G than deal with individual customers for any of the railroads, and getting passengers off the rail will be a bonus for them. The nodal nature of rail will always be a handicap compared to roads.
We do need autonomous, electric buses and trucks, but fully automated, electric railway technology exists now and has for many decades, and well over century in the case of electrification.[1][2] Standards-based electric trains and related technology are available for purchase off the shelf from multiple vendors, do not need to carry large battery packs in the vehicle, and no pie in sky hope for future automation of an insanely hard problem. Electric railways are the most optimized form of land-based transportation, and arguably the most overall.
“The first rule of any technology used in a business is that automation applied to an efficient operation will magnify the efficiency. The second is that automation applied to an inefficient operation will magnify the inefficiency.” - Bill Gates
[1] https://en.wikipedia.org/wiki/Automatic_train_operation
[2] https://en.wikipedia.org/wiki/List_of_automated_train_system...