Here are some of the photos I liked the best, representing the variety of scenes I saw while travelling around the city.
A Train - High St.-Brooklyn Bridge (Brooklyn)
B-D-F-V Trains - 47-50 Sts.-Rockefeller Center (Manhattan)
J-M-Z Trains - Canal St. (Manhattan)
S Train - Beach 106 St. (Queens)
2-3 Trains - Eastern Pkwy.-Brooklyn Museum (Brooklyn)
7 Train - 69 St.-Fisk Ave. (Queens)
2-5 Trains - Freeman St. (Bronx)
6 Train - Buhre Ave. (Bronx)
1 Train - 207 St. (Manhattan; right before I got detained by the cops)