Re: Speeds. I just want to point out that 150mph is maximum speed achieved for a few miles somewhere between Boston and New York. New York to DC is currently limited to 135mph because there is no constant tension catenary but even those speeds are rarely achieved anywhere along the line. So, the 220 number might be there to wow us, but what really matters is the average speed including station time of 130-140mph. Now that's impressive.
Or to quote the report:
Successful high-speed rail operations around the world have
commercial operating speeds (average speeds including time
in stations) of 130-140 mph. To meet these aggressive NEC
travel time goals, commercial operating speeds of roughly
140 mph would be needed, compared to 62 mph (New York
City-Boston) and 86 mph (New York City-Washington) under
present Acela operations.