Keystone Corridor - Earlier Studies

Earlier Studies

There have been earlier studies by the USDOT and FRA of the Keystone Corridor, and these studies contain proposals or speculations which might not be in the currently funded projects. Some of these ideas are below.

Amtrak service to Suburban Station, which is in Center City Philadelphia, ended in 1988. An early study says that PennDOT used Suburban Station as the Philadelphia endpoint for the 90-minute service to Harrisburg. Restoring service to Suburban Station may increase ridership but would require using the upper level of 30th Street Station and either scheduling trains to turn at Suburban Station or to continue through the Center City Commuter Tunnel (with Amtrak trains turning around at Wayne Junction).

Bypassing 30th Street Station by using the New York-Pittsburgh Subway would allow trains to skip a time-consuming stop and reverse of directions at 30th St Station and allow fast service between New York and Harrisburg. Historically, the PRR fast trains going to NY from the west would bypass 30th St Station, and passengers for Philadelphia would change trains at North Philadelphia. One study suggested two daily electric-train round-trips between New York and Harrisburg with stops in North Philadelphia and Ardmore, a routing last used by Keystone trains in 1994.

Track reconfiguration between Zoo and Overbrook interlockings can increase track speeds which are usually 30 miles per hour (48 km/h) due to the need to take diverging routes through switches. Reducing the number of diverging moves and the use of 45 miles per hour (72 km/h) switches can increase speeds. Also, the reconfiguration can allow for the removal of the overhead bridge that the R6 Cynwyd trains use. Some other interlockings may be removed or reconfigured. With the reconfiguration near Zoo, the Overbrook interlocking can be removed and replaced with 4 through tracks. Bryn Mawr interlocking may have storage tracks added west of the station to allow R5 Bryn Mawr locals to turn without occupying an express track. Paoli interlocking may be removed if the four-track configuration were to continue west of the station. Paoli station may be reconfigured with high-level island platforms serving all four tracks, as part of a new Paoli transportation center. Frazer interlocking may be reconfigured for turning SEPTA trains and as the point where four tracks become two.

Electrification may be converted to use commercial 60 Hz AC power instead of the special 25 Hz single-phase AC currently in use although this is doubtful due to the costs involved, lack of real benefits and dedicated 25 Hz hydro-electric capacity at the Safe Harbor Dam (which also generates electricity for the Northeast Corridor itself; the power going from the dam to the NEC (at Perryville, Maryland), via a 50-mile long pylon network). Between Paoli and 30th Street Station, most of the overhead electric wire and other electrification system components dates back to the original 1915 electrification, although the 1915 substations have been retired. West of Paoli the electrification dates from the late 1930s and west of Downingtown the system is still controlled by the original 1939 power dispatching office in Harrisburg utilizing electromechanical systems.