Philadelphia to Harrisburg Main Line

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For the Norfolk Southern (formerly Reading Company) line, see Harrisburg Line.
Amtrak and SEPTA regional rail service share operations over the Main Line grade between Philadelphia and Thorndale.

The Philadelphia to Harrisburg Main Line is an electrified rail line owned and operated by Amtrak in the U.S. state of Pennsylvania. The line runs from Zoo interlocking (MP 1.9) in Philadelphia, where it meets the Northeast Corridor, west to Harrisburg (MP 104.6), where electrification ends. It is part of the longer Keystone Corridor, which continues west to Pittsburgh along the Norfolk Southern Railway's Pittsburgh Line.[1]

The line runs along the route of the former Pennsylvania Railroad Main Line and passes through the Philadelphia Main Line, the suburban region named for it.

Amtrak's Keystone Service and Pennsylvanian operate over the entire line. SEPTA Regional Rail Paoli/Thorndale Line trains operate east of Thorndale, with the rights to continue revenue service west to Parkesburg and to run west to Cork Interlocking (just east of Amtrak's Lancaster station) to reverse direction.[1]

Freight trackage rights over the whole line are assigned to the Norfolk Southern Railway. The Canadian Pacific Railway also has rights over a small piece near Harrisburg, from the west end to Roy Interlocking in Royalton, to allow CP trains to get from the end of their Sunbury Line or Allentown to Perryville, Maryland.[1]


Of more than $26 million allocated to Pennsylvania rail projects by the 2009 American Reinvestment and Recovery Act, $25.6 million will be used to eliminate three grade crossings on the Philadelphia to Harrisburg Line. The elimination of the last grade crossings will allow for trains to travel at speeds up to 125 mph, instead of only 110 mph.[2]

Stations and interlockings[edit]

Grade crossing and signal bridge (#592) in Leacock Township, east of Lancaster, Pennsylvania

See Keystone Service for more information Key

  • (M) – Block and Interlocking Station (Manned)
  • (T) – Temporary Block Station
  • (X) – Interlocking
  • (D) – DCS Block Limit
  • R- – Remote Control From
  • (Line Name) – Interchange with
Milepost Station City Amtrak SEPTA Notes
0.0 Suburban Station Philadelphia All
1.0 30th Street Station AE CD CL CS KS NR PA PL SM SS VT All New Jersey Transit Atlantic City Line, all SEPTA commuter rail lines
1.9 ZOO (M)(X)(D) (SEPTA Main Line, Amtrak NEC)
3.5 STILES (X)(D) R-ZOO Tracks 2 and 4 only
4.0 VALLEY (X)(D) R-OVERBROOK (SEPTA Cynwyd line) Tracks 1 and 2 only
4.1 PAXON (X)(D) R-ZOO Track 4 only
5.1 WOODBINE (X)(D) R-ZOO Track 4 only
5.4 Overbrook Paoli/Thorndale (M)(X)(D)
6.0 Merion Lower Merion Paoli/Thorndale
6.8 Narberth Narberth Paoli/Thorndale
7.4 Wynnewood Wynnewood Paoli/Thorndale
8.5 Ardmore Ardmore Keystone Paoli/Thorndale
9.1 Haverford Haverford Paoli/Thorndale
10.1 Bryn Mawr Bryn Mawr Paoli/Thorndale (X)(D) R-PAOLI
10.9 Rosemont Rosemont Paoli/Thorndale
12.0 Villanova Radnor Paoli/Thorndale
13.0 Radnor Paoli/Thorndale
13.7 St. Davids Paoli/Thorndale
14.5 Wayne Paoli/Thorndale
15.4 Strafford Tredyffrin Paoli/Thorndale
16.4 Devon Easttown Paoli/Thorndale
17.5 Berwyn Paoli/Thorndale
18.6 Daylesford Tredyffrin Paoli/Thorndale
19.9 Paoli Paoli Keystone, Pennsylvanian Paoli/Thorndale (M)(X)(D)
21.6 Malvern Malvern Paoli/Thorndale
25.5 GLEN (X)(D) R-THORN (NS Dale Secondary) Tracks 1 and 2 only
27.5 Exton Exton Keystone, Pennsylvanian (trains 42 eastbound only) Paoli/Thorndale
28.3 Whitford Paoli/Thorndale
32.1 DOWNS Downingtown (X)(D) R-THORN
32.4 Downingtown Keystone Paoli/Thorndale
35.0 THORN Thorndale (M)(X)(D)
35.5 Thorndale Paoli/Thorndale
36.6 CALN (X)(D) R-THORN Track 1 and 2 only.
38.4 Coatesville Coatesville Keystone
44.2 Parkesburg Parkesburg Keystone
46.3 PARK (X)(D) R-CORK
Paradise planned future station which will connect with the historic Strasburg Rail Road
67.0 HOLLAND (X)(D) R-CORK Track 4 only (NS New Holland Industrial)
68.0 Lancaster Lancaster Keystone, Pennsylvanian
68.1 CORK (M)(X)(D) (NS Columbia Secondary)
70.0 LITITZ (X)(D) R-CORK Track 2 only (NS Lititz Secondary)
80.1 Mount Joy Mount Joy Keystone
86.8 Elizabethtown Elizabethtown Keystone, Pennsylvanian
94.5 ROY Middletown (X)(D) R-STATE (NS Royalton Branch)
94.7 Middletown Keystone
Harrisburg International Airport A station to serve the airport is to be located west of the existing Middletown station
104.4 STATE Harrisburg (M)(X)(D)
104.6 Harrisburg Keystone, Pennsylvanian End of electrification.


  • "The Electrification of the Pennsylvania Railroad from Broad Street Terminal Philadelphia to Paoli." The Electric Journal. Vol. 12, No. 12 (December 1915). (Pittsburgh, PA: The Electric Journal.) pp. 536-541.