On June 13, 1915, the first test train on the IRT Flushing Line ran between Grand Central and Vernon Boulevard–Jackson Avenue, followed by the start of revenue service on June 22. The Flushing Line was extended one stop from Vernon–Jackson Avenue to Hunters Point Avenue on February 15, 1916. On November 5, 1916, the Flushing Line was extended two more stops east to the Queensboro Plaza station. The line was opened from Queensboro Plaza to Alburtis Avenue (now 103rd Street–Corona Plaza) on April 21, 1917. Service to 111th Street was inaugurated on October 13, 1925, with shuttle service running between 111th Street, and the previous terminal at Alburtis Avenue on the Manhattan-bound track.