Paoli/Thorndale Line
A westbound Paoli/Thorndale Line train arriving atMalvern
Overview
Service type	Commuter rail
System	SEPTA Regional Rail
Status	Operating
Current operator	SEPTA Regional Rail
Daily ridership	9,814 (FY 2024)[1]
Website	septa.org
Route
Termini	Temple University Thorndale
Stops	26
Line used	Philadelphia–Harrisburg
Technical
Rolling stock	Electric Multiple Units,push-pull trains
Track gauge	4 ft 8+1⁄2 in (1,435 mm)standard gauge
Electrification	Overhead line,12 kV 25 Hz AC
Route map Show interactive map Legend Keystone Corridor (Main Line) toHarrisburg &Pittsburgh Parkesburg service ended 1996 Coatesville planned 35.2 mi 56.6 km Thorndale 32.8 mi 52.8 km Downingtown 28.7 mi 46.2 km Whitford 27.7 mi 44.6 km Exton 21.8 mi 35.1 km Malvern 19.9 mi 32 km Paoli Zone  4  3 18.6 mi 29.9 km Daylesford 17.5 mi 28.2 km Berwyn 16.4 mi 26.4 km Devon 15.4 mi 24.8 km Strafford 14.5 mi 23.3 km Wayne 13.7 mi 22 km St. Davids 13.0 mi 20.9 km Radnor 12.0 mi 19.3 km Villanova 10.9 mi 17.5 km Rosemont 10.1 mi 16.3 km Bryn Mawr Zone  3  2 9.1 mi 14.6 km Haverford 8.5 mi 13.7 km Ardmore 7.4 mi 11.9 km Wynnewood 6.8 mi 10.9 km Narberth 6.0 mi 9.7 km Merion 5.4 mi 8.7 km Overbrook Zone  2  C toCynwyd 52nd Street closed 0.9 mi 1.4 km 30th Street Station 0 mi 0 km Suburban Station 0.5 mi 0.8 km Jefferson Station 2.1 mi 3.4 km Temple University SEPTA Main Line toGlenside This diagram: view talk edit Show route diagram map

ThePaoli/Thorndale Line, commonly known as theMain Line, is aSEPTA Regional Rail service running fromCenter City Philadelphia throughMontgomery County andDelaware County toThorndale inChester County. It operates along the far eastern leg ofAmtrak'sPhiladelphia to Harrisburg Main Line, which in turn was once theMain Line of thePennsylvania Railroad and is now part of theKeystone Corridor, afederally-designatedhigh-speed rail corridor.

This branch makes local stops between Thorndale andCenter City Philadelphia along Amtrak'sPhiladelphia to Harrisburg Main Line, an electrified 104-mile two to four-track high-speed route betweenHarrisburg Transportation Center inHarrisburg and30th Street Station inPhiladelphia. The line was originally part of Pennsylvania's "Main Line of Public Works", a series of canals and railroads to connect Philadelphia withHarrisburg,Pittsburgh, and points west built between 1826 and 1834 by the Commonwealth of Pennsylvania. The tracks subsequently became part of theMain Line of thePennsylvania Railroad before eventually becoming Amtrak'sKeystone Corridor. TheMain Line also refers to the affluent Philadelphia suburbs along the line of the same name.

Prior to the late 1980s, all commuter rail operations went fromSuburban Station toPaoli, the westernmost census designated place along the Main Line. Because of this earlier operation, local residents called the R5 "the Paoli Local". Currently, all Paoli turn-around trains, which operate alternately on Saturdays and exclusively on Sundays, now use the nearbyMalvern train station as its last stop (the Paoli train yard was closed down in the mid-1990s and was converted into extra parking, and a new Paoli train station), and use theFrazer train yard as a turn-around location. The Paoli yard became an EPA superfund site.^[2] Prior to November 10, 1996, the service went as far west as Parkesburg,^[3] but service was truncated toDowningtown because Amtrak lacked facilities to turn SEPTA trains around, and trains were forced todeadhead out toLancaster. Service was extended from Downingtown to a new station in Thorndale on November 22, 1999.^[4]

A recent proposal to extend the Paoli/Thorndale Line service further west from its terminus atThorndale toLancaster has been discussed by regional planning organizations, government officials, and members supporting theCapital Red Rose Corridor, which will providecommuter rail along thePhiladelphia to Harrisburg Main Line between Lancaster andHarrisburg.^[5][6] Proponents of the Paoli/Thorndale Line extension to Lancaster, support that by allowingSEPTA andCapital Area Transit to operatecommuter rail serving smaller stations along the Keystone Corridor, it will allow for fewer stops and increased speeds forAmtrak'sKeystone andPennsylvanian trains between Philadelphia's30th Street Station and theHarrisburg Transportation Center indowntown Harrisburg. It is also suggested by community leaders and transportation officials that the addition of commuter rail serving portions ofLancaster andDauphin counties will help to alleviate future traffic congestion stemming from increased development along the same corridor.^[6] The entire main line between Thorndale, Lancaster and Harrisburg is currently electrified.

SEPTA announced on March 7, 2019, that service would be extended back toCoatesville "in the near future." A new Coatesville station is planned to be constructed by thePennsylvania Department of Transportation (PennDOT) at 3rd Avenue and Fleetwood Street near the existing Amtrak station. The station is currently in the design phase and once construction begins, it will take three years to complete and bring SEPTA service to Coatesville.^[7] In announcing the return of service to Coatesville, Chester County commissioner Terrence Farrell announced $1 million in funding to kick-start a parking garage to coincide with SEPTA's return to the station via the Paoli/Thorndale Line.^[8]

The Paoli/Thorndale Line is the busiest regional rail line in the SEPTA system, carrying approximately 21,000 daily riders each weekday prior to the pandemic.^[9] It is also among the longest in the system, stretching out into the far western suburbs of Philadelphia, and as such has express service to some of the outer stations. In general, express trains operate one of the following four itineraries:

• Local from30th Street only toBryn Mawr, making all intermediate stops then return to 30th Street;
• Express from 30th Street to Bryn Mawr, and then local toMalvern;
• Express from 30th Street to Bryn Mawr, and then local toThorndale;
• Express from 30th Street to Wayne, and then local toThorndale.

There was also a round trip "Great Valley Flyer" service which ran as an express between 30th Street andPaoli, skipping all intermediate stops before continuing toThorndale. This was the lastnamed train on SEPTA, and one of very few remaining named commuter trains in the nation.

Service was curtailed during theCOVID-19 pandemic in 2020-21 and all trains ran as locals. In the new schedule effective December 19, 2021,^[10] express service from30th Street toBryn Mawr, andWayne resumed but express trains between30th Street andPaoli were not restored.

All trains included in the Sunday timetable terminate atMalvern and do not serveExton,Whitford,Downingtown, orThorndale stations.

Electrified service between Philadelphia and Paoli was opened on September 11, 1915.^[11][12] As thePennsylvania Railroad's first local commuter to be electrified, the line was used as an "experiment" for powering trains usingACoverhead catenary wires.^[11] A previous commuter line to be electrified was theLong Island Rail Road inNew York City, but this line used theDCthird rail similar in nature to theNew York City Subway system and most other heavy-rail interurbans.^[13][11] In addition, the original catenary poles are still in service in Lower Merion.^[14] This was also the first line to get PRR position light signals between Overbrook and Bryn Mawr.^[15]

Between 1915 and the 1960s, the formerPennsylvania Railroad used theMP-54 electricmultiple-unit (EMU) railcars, which were brick red ("Tuscan Red") in color (green in the Penn Central era) and had characteristic "owl eye" round windows at car ends.^[12]

The MP-54s were replaced in the 1960s and 1970s with theSilverliner EMU cars, which are still in use today.^[16] More recently, SEPTA acquired push-pull coaches from theBombardier corporation, which were hauled byAEM-7 electric locomotives similar to those used by Amtrak andNew Jersey Transit. The AEM-7 locomotives were replaced withACS-64 electric locomotives in 2018.

Between 1984 and 2010 the route was designatedR5 Paoli andR5 Thorndale as part of SEPTA'sdiametrical reorganization of its lines. Paoli trains operated through the city center to theLansdale/Doylestown Line on the ex-Reading side of the system.^[17] The R-number naming system was dropped on July 25, 2010.^[18] As of 2022^[update], most Paoli/Thorndale Line trains either terminate at Temple University or continue through Center City to points along theWest Trenton Line on weekdays and points on the Lansdale/Doylestown Line on weekends.^[19]

As a part of the Keystone Corridor upgrade projects conducted by Amtrak andPennDOT, the line was upgraded in 2007 with new concrete ties, continuous welded rails, and overhead lines and substations. This upgrade allows SEPTA and Amtrak to operate multiple trains at the same time in the same manner as that found on theNortheast Corridor.

SEPTA activatedpositive train control on the Paoli/Thorndale Line on May 1, 2017.^[20]

On April 9, 2020, service on the line was truncated toMalvern due to theCOVID-19 pandemic. Service to Thorndale resumed on June 15, 2020.^[21][22]

In June 2025, as part of a set of SEPTA budget cuts, it was proposed that the Paoli/Thorndale Line would be discontinued on January 1, 2026.^[23] However, on September 5, 2025 SEPTA cancelled the planned service cuts due to a court order being issued to restore SEPTA services. Instead, SEPTA implemented a fare increase that went into effect on September 14th.^[24]

The Paoli/Thorndale Line includes the following stations west of theCenter City Commuter Connection; stations indicated with a gray background are closed.^[10]

Zone	Location	Station	Miles (km) from Center City	Date opened	Connections / notes
C	Parkside, Philadelphia	52nd Street	4.0 (6.4)	1902	Closed August 23, 1980[25]
2	Overbrook, Philadelphia	Overbrook	5.4 (8.7)	1860	SEPTA City Bus:63,65
	Merion	Merion	6.0 (9.7)	1914
	Narberth	Narberth	6.8 (10.9)	Rebuilt 1980	SEPTA City Bus:44
	Wynnewood	Wynnewood	7.4 (11.9)	1870	SEPTA Suburban Bus:105
	Ardmore	Ardmore	8.5 (13.7)	1870	Amtrak:Keystone Service SEPTA City Bus:44 SEPTA Suburban Bus:103,105,106
	Haverford	Haverford	9.1 (14.6)	1880	SEPTA Suburban Bus:105,106
3	Bryn Mawr	Bryn Mawr	10.1 (16.3)	1869	SEPTA Suburban Bus:105,106
	Rosemont	Rosemont	10.9 (17.5)	1880	SEPTA Suburban Bus:105,106
	Villanova	Villanova	12.0 (19.3)	1890	SEPTA Suburban Bus:106
	Radnor	Radnor	13.0 (20.9)	1872	SEPTA Suburban Bus:106
	Wayne	St. Davids	13.7 (22.0)	1890
		Wayne	14.5 (23.3)	1882-1884	SEPTA Suburban Bus:106
		Strafford	15.4 (24.8)
	Devon	Devon	16.4 (26.4)	1883	SEPTA Suburban Bus:106
	Berwyn	Berwyn	17.5 (28.2)	1884	SEPTA Suburban Bus:106
		Daylesford	18.6 (29.9)		SEPTA Suburban Bus:106
4	Paoli	Paoli	19.9 (32.0)	1893	Amtrak:Keystone Service,Pennsylvanian SEPTA Suburban Bus:92,106,204,206
	Malvern	Malvern	21.8 (35.1)	1900	SEPTA Suburban Bus:92
	Exton	Exton	27.7 (44.6)		Amtrak:Keystone Service,Pennsylvanian SEPTA Suburban Bus:135
		Whitford	28.7 (46.2)	Rebuilt 1981
	Downingtown	Downingtown	32.8 (52.8)	19th century	Amtrak:Keystone Service SEPTA Suburban Bus:135
	Thorndale	Thorndale	35.2 (56.6)	November 22, 1999 (1999-11-22)[4]	SEPTA Suburban Bus:135
	Coatesville	Coatesville	38.1 (61.3)		Amtrak:Keystone Service SEPTA service ended November 10, 1996.[26]
	Parkesburg	Parkesburg	43.9 (70.7)		Amtrak:Keystone Service SEPTA service ended November 10, 1996.[26]

The Paoli/Thorndale Line has the highest total ridership on the system. Between FY 2013–FY 2019 yearly ridership ranged from 6–6.5 million, save a drop to 5.5 million in FY 2017. In FY 2019 its 6,170,950 passengers exceeded the next highest, theLansdale/Doylestown Line, by nearly 1.2 million. Ridership collapsed during theCOVID-19 pandemic.^{[note 1]}

• SEPTA – Paoli/Thorndale Line

• SEPTA Regional Rail
• Pennsylvania Railroad lines
• Radnor Township, Pennsylvania
• Philadelphia to Harrisburg Main Line

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