8 (New York City Subway Service) - Astoria Line

Astoria Line

The 8 label was first used for the Astoria Line, which opened on February 1, 1917 as an extension of the Queensboro Line (now part of the Flushing line) from Queensboro Plaza. The Corona Line (now also part of the Flushing Line) had already been built as another branch from Queensboro Plaza; when the Astoria Line opened half the trains ran to each terminal. At the time, the Queensboro Line ended on the other side of the Steinway Tunnel at Grand Central.

Tracks opened over the Queensboro Bridge on July 23, 1917, allowing elevated trains of the IRT Second Avenue Line to operate to Queensborough Plaza and then over either the Astoria or Corona line. Once this link opened, all elevated trains went to Astoria, and all subway trains to Corona, but this was modified by 1923, with both divisions running on each line. On March 22, 1926, the Queensborough Line (and Astoria service) was extended west to Fifth Avenue, and it was completed west to Times Square on March 14, 1927.

BMT shuttles (coincidentally also labeled 8) began using the Astoria Line on April 8, 1923, with a transfer to the Broadway Line at Queensborough Plaza. This joint operation ended on October 17, 1949, and all IRT trains started operating to Flushing (where the Corona Line had been extended in 1928) and all BMT trains operated to Astoria. The numbers were only publicly used starting in 1948, so the public only knew the Astoria Line's IRT services as the 8 for about a year.