Back in the early 1980's, Conrail, as successor to the Penn Central and Pennsylvania Railroad(s), closed down the formely-electrified freight operation between Enola Yard at Harrisburg and the East Coast.
This service formerly operated between Enola and Trenton, N> J. via Columbia, Parkesburg, and Thorndale, intesecting the Harrisburg-Lancaster-coatesville passenger line in the process.
With the formation of Conrail, the former East Penn mainline of the Reading, via Lebanon, provided a more suitable opportunity, and what was uaually known as the "Low Grade Line" and/or "trenton Cuitoff" was retired
But in the wake of recent major, and likely, permanent shifts in the energy picture, the first stirrings of aovement to revive Harrisburg-Reading-Lehigh Valey-New York passenger rail service are getting under way, and I believe such a move would require diversion of much of the reeight traffic, currently about 35 moves daily east of Reading and at least 55 to the west.
It will likely take a few more years, and more pain at the pump, but that line is simpy too strategic to dismantle.
What a revoltin' development this is! (William Bendix)