As part of the construction of Grand Central Terminal in the early 1900s, all of New York Central's lines that ran into the terminal were electrified. Third rail was installed on the Hudson and Harlem Divisions, while the New Haven Division received overhead wires on the segments that were not shared with the Harlem and Hudson Division. Steam locomotives on the New Haven Division were replaced with electric locomotives, and later electric multiple units.Westport Historical Society, interpretive plaque, Westport Historical Society Museum, Carriage House, read September 30, 2007 New Haven Division electric trains started running to Grand Central in October 1907. The replacement of the Housatonic River Railroad Bridge that year completed quadruple-tracking of the line from Woodlawn Junction to New Haven.
