I found a really interesting video on the New York Subway system, filmed in 1949:
One thing that’s particularly interesting is mention of the “Second Avenue Subway” as a project that was about to get underway. 62 years later and New York is finally starting to get around to completing this massive (and essential) project. Almost as bad as our own CBD Rail Tunnel, which has been on plans since at least the 1920s.
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Nice vid thanks.