2. World’s Fair Subway Line
This line was created specifically for the World’s Fair in 1939 in Queens. The line started near the Forest Hills-71st Street stop along today’s M/R lines, by what the Queens Boulevard line of the IND, ran through Jamaica Yard, turned north at the east side of Flushing Meadows-Corona Park and rolled into the World’s Fair Terminal Station. The two-mile long track cost a total of about $1.7 million to build, operate, and maintain.
On January 15, 1941, demolition of this line began following expense issues and political pressure. There was some movement back then to keep the line working, but there wasn’t much need after the fair ended as Citi Field and the US Tennis Association hadn’t been established yet. Moreover, the line didn’t meet construction standards for permanent lines at the time which required them to be underground.
For more, check out NYC’s Lost World’s Fair Subway Line of 1939 and 1940.