The MARC system consist of
3 separate lines. 2 of them connect Baltimore and Washington DC. The
Penn Line which operates on Amtrak's NE Corridor from Wilmington,
Delaware, to DC. The Camden Line runs on the old B&O line from Camden
Yards station in Baltimore to DC. The third line is the Brunswick line
which runs from DC to either Martinsburg, WV or Fredrick, MD on the old
B&O Line
Most MARC trains are diesel
powered, with the exception of most trains on the Penn Line are
electrified.
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