First section from left to right
The long, narrow format is based on the "Art Cards" done by various illustrators and produced by the New York MTA.
A subway car full of fictional characters, mostly appealing to children.
From left to right, including, but not comprehensively:
Dumbledore, Chingachgook (Last of the Mohicans), Dorothy, Wicked Witch, Ulhura, Spider Man, Sherlock Holmes, Red Riding Hood, Frankenstein's monster, Jeannie (I Dream of), Annie Oakley like woman in western gear, Steve from Blue’s Clues, Xena, Super Man, Han Solo