Originally Posted by wxguy

Just to add a bottleneck, though not frequent -- if a northbound Acela loses its "slot" between PVD and BOS, it can get stuck behind an MBTA commuter rail local train operating from either PVD or Stoughton inbound to BOS. I've crawled all the way from Canton Junction to Back Bay many times -- adding a good 20 minutes due to this.

Separately, Amtrak has ceased using "Avelia Liberty" referring to the new trainsets. It's now exclusively "NextGen Acela." I understand that their research showed "Acela" was a well-understood brand, and they changed their mind on a rebrand to a new name for the trainsets and service.