visagrunt wrote:
There are a huge number of impediments:
1) High speed rail is primarily a passenger requirement. But passengers make up a tiny fraction of the use of railbed. Freight operaters will have little use for high-speed rail.
2) High speed rail requires dedicated tracks. High speed rolling stock can't use conventional track, and you can't run at high speed if your track is occupied by conventional rail traffic ahead of you.
3) New infrastructure for high speed rail is spectacularly expensive, given the size of the US. It is precisely the places where high speed would make most sense, areas of dense population (the North East, the Pacific Coast) that the land acquisition costs are the most expensive.
Highspeed rail is competitive with air travel and road only in the "sweetspot" of journeys of about 2 - 5 hours. Less than two, and road can demonstrate itself significantly more efficient. Over 5, and the speed of air travel takes over. Given this limited scope, high speed rail is only practical in a handful of regions in North America.
All transportation is expensive, especially in the US. The federal government subsidizes all forms of transportation in one way or another. The US Interstate Highway system is probably the most expensive (certainly the largest) transportation system in the world, and the government pays for it all. Gasoline taxes act as an indirect toll, but for the most part, most people on the system are free riders. High speed rail cannot survive without government subsidies, but if the Interstate Highway system were privatized tomorrow, we'd have only a handful of highways built.
As a side note, California is already building high speed rail. I'm not sure how they will finance it, but the political will is certainly there. I certainly think it'll cut into airplane travel between Los Angeles and San Francisco.