Editing IRT Flushing Line (section)

==== Eastern expansion ====
The eastern extension to Flushing–Main Street opened on January 21, 1928.<ref>{{cite news|title=Flushing Rejoices as Subway Opens – Service by B.M.T. and I.R.T. Begins as Soon as Official Train Makes First Run – Hope of 25 Years Realized – Pageant of Transportation Led by Indian and His Pony Marks the Celebration – Hedley Talks of Fare Rise – Transit Modes Depicted|url=https://timesmachine.nytimes.com/timesmachine/1928/01/22/94122788.pdf|newspaper=[[The New York Times]]|access-date=September 18, 2015|date=January 22, 1928}}</ref> At this time, Corona Yard opened, with the inspection shed and some yard tracks available for use.<ref>{{Cite book|url=https://books.google.com/books?id=Oxs9AAAAIAAJ|title=Annual Report for the Year Ending June 30, 1927|date=1927|publisher=Interborough Rapid Transit Company|language=en}}</ref>{{Rp|9}} The remaining tracks opened on April 16, 1928.<ref name=":4" />{{Rp|104}}

For the [[1939 New York World's Fair]], the [[Willets Point Boulevard (IRT Flushing Line)|Willets Point Boulevard]] station was rebuilt and centered on 123rd Street, just west of where the station originally lay. Some remnants of the old station are still visible; ironwork tends to indicate where the older outside-platform stations were, and the remains of the fare entry area can be seen east of the current station. The original [[Willets Point, Queens|Willets Point Boulevard]] station was a "minor" stop on the Flushing Line; it had only two stairways and short station canopies at platform level. It was rebuilt into the [[World's Fair (IRT Flushing Line)|much larger station]] in use today, and the ramp used during two World's Fairs still exists, but is only used during special events, such as the [[US Open (tennis)|US Open]] for [[tennis]]. Express service to the World's Fair began on the Flushing Line on April 24, 1939.<ref>{{cite news|title=Fast Subway Service to Fair Is Opened|url=https://timesmachine.nytimes.com/timesmachine/1939/04/25/91572482.pdf|newspaper=The New York Times|date=April 25, 1939|page=1|access-date=October 2, 2011}}</ref>

Currently and historically, the IRT assigned the number [[7 (New York City Subway service)|7]] to its Flushing Line subway service, though this did not appear on any equipment until the introduction of the [[R12 (New York City Subway car)|R12 rolling stock]] in 1948. The BMT assigned the number 9 to its service, used on maps but not signed on trains.<ref>{{Cite web|url=http://www.thejoekorner.com/lines/suball-frame.htm|title=Line Names|last=Korman|first=Joseph|date=December 29, 2016|website=www.thejoekorner.com|access-date=April 29, 2018|archive-date=April 10, 2021|archive-url=https://web.archive.org/web/20210410202206/http://www.thejoekorner.com/lines/suball-frame.htm}}</ref>