Old Main Line may refer to:
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BCN Old Main Line
The BCN Main Line, or Birmingham Canal Navigations Main Line is the evolving route of the Birmingham Canal between Birmingham and Wolverhampton in England.
The name ''Main Line'' was used to distinguish the main Birmingham to Wolverhampton ro ...
, a canal network (and historic company name) in Birmingham, England
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BMT Lexington Avenue Line
The BMT Lexington Avenue Line (also called the Lexington Avenue Elevated) was the first standard elevated railway in Brooklyn, New York, operated in its later days by the Brooklyn Rapid Transit Company, the Brooklyn–Manhattan Transit Corporat ...
, he first standard elevated railway in Brooklyn, New York
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Old Main Line Subdivision of CSX Transportation (and formerly of the Baltimore and Ohio Railroad)
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