Connecticut Southern Railroad

The Connecticut Southern Railroad is a long short-line railroad operating in Connecticut and Massachusetts on lines originally operated by the New York, New Haven and Hartford Railroad, later operated by Penn Central and Conrail. It is a subsidiary of Genesee & Wyoming. The line is headquartered in Hartford, Connecticut, and interchanges with CSX in West Springfield, Massachusetts and New Haven, Connecticut. Pan Am Railways exercises trackage rights to access its line in Berlin, Connecticut connecting to Waterbury, Connecticut.
The railroad began operations in 1996, and was acquired by RailAmerica in 2000. Genesee & Wyoming acquired the railroad as part of its acquisition of RailAmerica in 2012.
Traffic comes mainly from construction materials, as well as food products. The CSO hauled around 23,000 carloads in 2008. The tracks are also shared with Amtrak passenger trains.