According to an article about the Delaware & Hudson in the latest issue of Passenger Train Journal (2019-2) the CNJ used trackage rights running the INTERSTATE EXPRESS between Wilkes Barre and Scranton on the D & H.
Thanks for that! As I said, the “Interstate Express” is a new one on me.
August 1957 OG for DL&W shows coaches Philadelphia-Wilkes Barre (RDG/CNJ 301/306) and Binghamtom-Syracuse (DL&W 1301/1306). CNJ’s section does not list the train at all. Reading’s section says coach passengers carried only for CNJ points.