I've opined and heard grumblings (not officially but from people who'd be privy to internal discussions) that Mystic Junction will need to become an interlocking again. Having a freight train climb that grade, stop, unlock the switch, and then start on said grade is prohibitive. If a fright train is to move from Yard 10 to the New Hampshire Route, it's going to need to be lined and cleared before ascending that grade. I've also heard that, while the T-Pad as we know it is in fact moving to IHP, the current one will remain so equipment can be put on in the terminal area. So the concept of sending track equipment to the Boston end of the New Hampshire Route via yard 10 is fathomable.
Moderator: Massachusetts Bay Transportation Authority, Brightline Trains
Avatar:3679A (since wrecked)/3623B (now in service as 3636B).