The Economist has an interesting article on the effect of America's high speed rail dreams on our existing freight rail system.
But the problem with America’s plans for high-speed rail is not their modesty. It is that even this limited ambition risks messing up the successful freight railways. Their owners worry that the plans will demand expensive train-control technology that freight traffic could do without. They fear a reduction in the capacity available to freight. Most of all they fret that the spending of federal money on upgrading their tracks will lead the Federal Railroad Administration (FRA), the industry watchdog, to impose tough conditions on them and, in effect, to reintroduce regulation of their operations.