The line originated at the Queens Boulevard portal of Jamaica Yard as a continuation of the tracks that diverged from the Queens Boulevard Line east of 71st−Continental Avenues. The line ran along the eastern edge of Flushing Meadows–Corona Park for
Station
The World's Fair station was the line's northern terminus and its sole station. The stop was alternately named the Horace Harding Boulevard station, after the avenue where it was located.
The World's Fair Corporation allocated a site for the station's construction. The station was a three-story wood, steel, and concrete structure. One level was used as a bus terminal, while the other two stories were used as the subway station. Three ramps, each measuring long and wide, connected the platforms with the upper levels. A New York Herald Tribune article likened the IND station to "a modernistic suburban railway station". Before the beginning of the 1940 season, thirty lights were installed on the ramp leading to the World's Fair station. Each lamp consisted of a pair of 12-foot-wide (3.7 m) "wheels" atop a 20-foot-tall (6.1 m) pole.
The station itself was a stub-end terminal with two tracks and three platforms, organized in a Spanish solution. A third siding was built south of the station. The platforms and tracks were built atop 317 wooden pilings, or stilt foundations. Each of the pilings measured long and across and were installed using pneumatic hammers. Due to the expense of removing the pilings, workers decided to leave the foundations in place after the fair. and low-income adults were also permitted to pay 5 cents at the end of the 1940 season. A double fare was later implemented on stations of the IND Rockaway Line, which opened in 1956 and used this fare system until 1975.
Competing service
The IRT and BMT also served the World's Fair, but did so directly with World's Fair (now Mets–Willets Point) station on the dual-operated Flushing Line, which was rebuilt into an express station for the Fair. A Long Island Rail Road station, the current Mets–Willets Point station, was built next to the Flushing Line station.