A typical Keystone consist usually contains an ACS-64 electric locomotive and five passenger cars, consisting of four Amfleet coaches and a rebuilt Metroliner cab car.
As a result of the signal, track, and catenary upgrades that were completed in October 2006, Keystone trains run in a push–pull mode, one of the few Amtrak services to do so.
Before the 2006 upgrades, diesel power (typically a GE Genesis locomotive) was needed between Harrisburg and Philadelphia.

The trains consist of unreserved coaches between Harrisburg and Philadelphia and reserved coaches between Philadelphia and New York.
There is no business class or snack/food service.
However, there is a quiet car on all trains, and free Wi-Fi service is offered.
Amenities vary by train.
A typical Keystone consist usually contains an ACS-64 electric locomotive and five passenger cars, consisting of four Amfleet coaches and a rebuilt Metroliner cab car. As a result of the signal, track, and catenary upgrades that were completed in October 2006, Keystone trains run in a push–pull mode, one of the few Amtrak services to do so. Before the 2006 upgrades, diesel power (typically a GE Genesis locomotive) was needed between Harrisburg and Philadelphia.
The trains consist of unreserved coaches between Harrisburg and Philadelphia and reserved coaches between Philadelphia and New York. There is no business class or snack/food service. However, there is a quiet car on all trains, and free Wi-Fi service is offered. Amenities vary by train.
Keystone Service