Baltimore and Ohio Short Line Railroad
|Locale||Allegheny County, Pennsylvania|
|Dates of operation||1883–|
|Predecessor||Pittsburgh Southern Railway|
|Successor||Wheeling, Pittsburgh and Baltimore Railroad|
|Track gauge||4 ft 8+1⁄2 in (1,435 mm) standard gauge|
|Previous gauge||3 ft (914 mm) gauge|
The Baltimore and Ohio Short Line Railroad was the successor to the Pittsburgh Southern Railway, and a subsidiary of the B&O Railroad, and was organized as a legal entity 25 February 1885. The railroad was a link in the attempt of the B&O to serve the Pittsburgh market, and became part of the Wheeling Division of that railroad. It was constructed by gauge conversion of the former 3 ft (914 mm) narrow gauge railway to 4 ft 8+1⁄2 in (1,435 mm) standard gauge and the building of the Whitehall Tunnel. It ran from Glenwood Junction to Washington, Pennsylvania, a distance of 34 miles.