Fourth and final 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:
Hermione, The Scarecrow, Alice, Sleeping Beauty, Pippi Longstocking, Cat Woman, Ahab, Captain America, Princess Leia, Mario, the Mummy, Christopher Robin, Robin, Mace Windu, The Tin Man, Tia (Princess and the Frog), Storm... and others too partial to mention.