Forgot to mention: Note the early transfer table found at the 20:34-20:40 mark.
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
I enjoyed it also. I learned quite a bit.
For those of you interested in the history and development of the first subway in America, this is worth a watch:
The Race Underground
I found it fascinating and will probably watch it again sometime.
Tom