Billy Joel=fucking LEGEND!
Joel wrote the song after returning to the East Coast from Los Angeles, where he had spent the previous three years. In fact, most of Turnstiles deals with Joel's cross-country relocation, including "Say Goodbye to Hollywood", "I've Loved These Days", "Summer, Highland Falls", and "Miami 2017 (Seen the Lights Go Out on Broadway)."
The inspiration for the song came from his pride in returning home to New York. Joel was literally "takin' a Greyhound [bus] on the Hudson River Line [route]" when the idea for the song came to him, and the song was written as soon as Joel arrived home.