The train film
Oh yes, the train film. The soundtrack was an electric piano which mostly repeated the same flowing musical phrase.
"Riding, on the train
You can hear (feel?) the rolling wheels of the train.
Rapid Transit Trains go there
Dongan Hills to Union Square
Buy your tickets, at the station
Waiting for those good, vibrations
Riding, on the train
You can see out the window of the train
The A-train, B-train, Double-C
Takes you where you want to be
Ride a local or express
There's no difference, each, is best
Each is best."
It took me a long time to figure out where "Dongan Hills" was. Turns out it's a station stop on the Staten Island Rapid Transit. Of course, you can't take a train from there to Union Square like the song implies, not without taking the Staten Island Ferry as a connection at least. All they showed for Union Square was a vintage black-on-yellow Manhattan street sign.
The double-C, or CC train, I think used to refer to the express on the C-train. I do not believe the NYCTA still uses double letters.