I am the safety director for an intermodal carrier. While we haul directly from the ports in Newark, Baltimore, Norfolk, Charleston & Savannah; the rest of our locations [50%] are all working from railheads, Chicago, Detroit [via Chicago], Columbus, Cleveland & Atlanta.
Sometimes it really is convienience. We serve one customer in Kentucky from one seaport in the south. Another location picked up the same customer 'cause the rail shipment to a closer railhead added TWO weeks to the delivery time while we get them there the day after it comes off the ship.
Same idea, a shipper exporting from the midwest uses our trucks to get the goods to the port to make the ship sailing day after tomorrow; he can't wait two weeks.
Grandson of a LV Conductor & I remember the EL running behind the Univ. of Scranton [class of 76]