The Boston Elevated Railway (BERy) opened its Cambridge Subway from Park Street Under to Harvard on March 23, 1912. The line ran in the median of the Longfellow Bridge to cross the Charles River. Like the Lechmere extension opened the same year and the Boylston Street subway opened in 1914, the Cambridge Subway originally had no station serving the area just outside downtown Boston, to speed travel time from farther stations. Although Bowdoin opened on an extension of the East Boston Tunnel in 1916, much of the West End and Beacon Hill neighborhoods were poorly served by the subway system.