For freight: BIW must have generated some traffic. There's also an interesting bit in Woolwich, right near the Cumberland Farms. Where the "pedestrian tunnel" now goes under US 1, that was a spur that led down to the east bank of the river. Must have had some kind of transload there.
Of course, I don't have to mention interchange with the WW&F...
The MEC owned the Hotel Samoset in Rockland for a time.