A short portion of the line, coming off the north side of the Manhattan Bridge through Canal Street to 14th Street–Union Square, opened on September 4, 1917, at 2 P.M., with an eight car train carrying members of the Public Service Commission, representatives of the city government and officials of the BRT, leaving Union Square toward Coney Island. Service opened to the general public at 8 P.M., with trains leaving Union Square and Coney Island simultaneously. The line was served by two services. One route ran via the Fourth Avenue Line and the Sea Beach Line to Coney Island, while the other line, the short line, ran to Ninth Avenue, where passengers could transfer for West End and Culver Line service. The initial headway on the line was three minutes during rush hours, three minutes and forty-five seconds at other times, except during late nights when service ran every fifteen minutes.