I've got something to say about high-speed rail. I've traveled on the TGV three times, and each time I was really uncomfortable. The windows don't open, there's no compartments, there's no dining or lounge car, the seats are small. As I remember, you couldn't walk from one end of the train to the other, and there wasn't really any reason to, since it was all coaches.
Yes, maybe it's important to be able to get from LA to San Francisco in three hours, or from Chicago to Minneapolis in four. Business travelers probably don't care if they don't leave their seats as long as they have a laptop and wifi. But one of the big advantages of train travel is the comfort. Let's not sacrifice that for a top speed that's hardly ever achieved.