The American rail network is a relic compared to those of the rest of the world. I've visited different countries and got to use their rail transportation (whether it be underground metros or high speed rail), and boy does it feel like stepping into the future.
I read an article about how Japan recently conducted a speed test of the L0 series Maglev Train, and after looking at the specs I noticed that its design, record, and operational speeds are 550 km/h, 600 km/h, and 500 km/h respectively (that's 342, 373, and 311 mph respectively for the yanks). China has managed to develop an extensive high speed rail network in less than 20 years, and the landmass of mainland China is around the same as that of the US.
But then you come to the US and you see these sad, sardine can looking Amtrak diesel trains that are beholden to the Class I freight companies since the latter own pretty much every major rail corridor in the US, and it's been like that for forever, leading to a horribly inefficient rail network primarily due to traffic priority being given to the freight trains. Sure, there are some sporadic high speed rail lines in progress, most notably the California High Speed Rail, but how long has it been between kickoff to start of construction to now, and only a portion of the line is operational.
The parasites known as NIMBYs, airline and automobile lobbyists, and numerous government officials are to blame; they see such modernization projects as costs rather than investments, disturbances to their gated communities and their house values rather than a practical, more efficient method of transportation. Also, freight companies make bank out of Amtrak leasing their corridors to use so they don't want to give it up.
America needs a total overhaul of it's rail infrastructure.