> what in your opinion is the worst issue that set has faced? Well the crappy infrastructure (shared ROW, lots of stops, lots of crossings, 100-year old catana

> what in your opinion is the worst issue that set has faced? Well the crappy infrastructure (shared ROW, lots of stops, lots of crossings, 100-year old catanary south of NYC, etc) is by far the most detrimental issue to Acela performance. With regard to the actual Acela vehicles itself: from what the insiders have told me, the worst issue the set has faced was, frankly, the selection of Bombardier/Alstom in the first place. I was told that when FRA auditioned the various HSR vehicles on the NEC (they actually paid to bring over a bunch of European trainsets to the NEC for testing back in the late 80's or early 90's), Siemens told them that their vehicle (ICE) could meet most of FRA/Amtrak's spec with a little work but not everything. Bombardier/Alstom said they could meet all of the performance requirements with no problems. After getting the vehicle contract, Bombardier/Alstom started to agitate about not being able to meet large parts of the specs which led to compromises in the design and delays. By the time FRA/Amtrak realized they made the wrong choice, they were in too deep. Again from what I've heard, if Amtrak/FRA had it to do over again, they would have gone with Siemens. It will be interesting to see what happens when it's time to replace the Acela.