It is because the overhead electric power ends at Harrisburg that an initial passenger train service improvement might be made using a seamless transfer for motive power from electric to diesel electric. A locomotive design able to operate both from overhead electric power and as a diesel electric locomotive is currently being operated by New Jersey Transit. Such a design could be applied to the Keystone Corridor West. Time consuming exchange of a straight electric to a separate diesel electric locomotive would be avoided.
The easiest service improvement would be to extend passenger service to Lewistown, PA using a dual electric - diesel electric locomotive. Doing so would serve the student population of Penn State.