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Reference.org
Old Main Line Subdivision
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<p>The Old Main Line Subdivision is a <a href="/facts/Railroad/9nJQbsDV">railroad</a> line owned and operated by <a href="/facts/CSX_Transportation/c7PvWozd">CSX Transportation</a> in the U.S. state of <a href="/facts/Maryland/tVy9fC1n">Maryland</a>. The line runs from <a href="/facts/Relay%2c_Maryland/aWaGG5ee">Relay</a> (outside <a href="/facts/Baltimore/ncJvTzBU">Baltimore</a>) west to <a href="/facts/Point_of_Rocks%2c_Maryland/zAV4GNwd">Point of Rocks</a>, and was once the main line of the <a href="/facts/Baltimore_and_Ohio_Railroad/qSpE5pY1">Baltimore and Ohio Railroad</a>, one of the oldest rail lines in the United States. At its east end, it has junctions with the <a href="/facts/Capital_Subdivision/utHCQchF">Capital Subdivision</a> and the <a href="/facts/Baltimore_Terminal_Subdivision/pYoTbeqb">Baltimore Terminal Subdivision</a>; its west end has a junction with the <a href="/facts/Metropolitan_Subdivision/m31ATYlt">Metropolitan Subdivision</a>. </p>