CSX on Nov. 1 announced that it is cancelling its share of a long-planned P3 (public-private partnership) to rebuild and expand Howard Street Tunnel, a 122-year-old structure under downtown Baltimore originally built by the Baltimore & Ohio Railroad. The project, of which CSX’s share was $145 million, would have cleared the tunnel for double-stack intermodal trains serving the Helen Delich Bentley Port of Baltimore, which has experienced an increase in container traffic since opening of the expanded Panama Canal in 2016.