On paper, the fastest route would appear to be Geneva to Solvay, interchange with CSX, CSX to Selkirk, Selkirk to Worcester, interchange with PAR, PAR to Ayer, Ayer to South Portland, South Portland to Brunswick, interchange with the Rockland Branch.
However, Selkirk is like the Bermuda Triangle of foreign locomotives. It's not uncommon for non-CSX locomotives to languish there for days or weeks or get misrouted to God knows where... so one way to avoid that would be Geneva to Solvay, interchange with CSX, CSX to Rotterdam Junction, interchange with PAS, PAS to East Deerfield, East Deerfield to Ayer, interchange with PAR, Ayer to South Portland, South Portland to Brunswick, interchange with the Rockland Branch.
MEC407
Moderator:
Pan Am Railways — Boston & Maine/Maine Central — Delaware & Hudson
Central Maine & Quebec/Montreal, Maine & Atlantic/Bangor & Aroostook
Providence & Worcester — New England — GE Locomotives