This is the 1913 Map showing how the rapid transit lines will look after completion in accordance with the Dual Contracts. Note two unfinished BMT lines that were proposed in the contracts but never finalized: The BMT Crosstown Elevated, which was later built as today’s “G” line Subway (although not exactly along the same route). Also note that the Flushing line was not supposed to terminate at Main Street but was supposed to continue to the East.
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Before the BMT
If you are interested in the service history of the BMT from 1923-1940, including virtually all maps issued by the company, purchase our book:
REVISED EDITION COMING SOON
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Single line Drawings of the Astoria and Flushing lines
For an explanation of how to read these go to this page on NYCSubway.org. It contains an excellent explanation