Montreal,
Maine and Atlantic Railway - (en)
The Montreal, Maine and Atlantic Railway (AAR reporting marks MMA) is
a regional freight railroad operating in the U.S. states of Maine and
Vermont and the Canadian provinces of New Brunswick and Quebec. Its
Canadian subsidiary is Montreal, Maine & Atlantic Canada Company.
The entire system is owned by RailWorld, Inc. and is headquartered
near Bangor, ME.

Predecessor railroads
MMA was created in 2003 to operate several bankrupt railroads
purchased by RailWorld, Inc. from holding company Iron Road Railways.
These systems included:

Bangor and Aroostook Railroad (BAR) which operated from Searsport, ME
to Bangor, ME, Brownville Junction, ME and north to Aroostook County
where it served Houlton, ME, Presque Isle, ME, Madawaska, ME, and Van
Buren, ME.
Canadian American Railroad (CDAC) which operated the former Canadian
Pacific Railway (CPR) Saint John, NB-Montreal, QC main line west of
Brownville Junction to Lennoxville, QC (built as the International
Railway of Maine)
Quebec Southern Railway (QSR) which operated the former CPR Saint
John, NB-Montreal, QC main line west of Lennoxville, QC to Farnham, QC
(later extended to St. Jean, QC and by trackage rights to Montreal, QC)
Northern Vermont Railroad (NVR) which operated the former CPR Farnham,
QC-Wells River, VT secondary main line.
Van Buren Bridge Company (VBB) which operates a railway bridge
crossing the St. John River, across the Canada-United States border,
between BAR trackage in Van Buren, ME and Canadian National (CN)
trackage in St. Leonard, NB.