L (SEPTA Metro)

Market–Frankford Line (L) B train at 63rd Street in 2007
Overview
Status	Operating
Owner	City of Philadelphia (Frankford to 15th St) SEPTA (15th St to 69th St)
Locale	Upper Darby, Millbourne and Philadelphia, Pennsylvania, U.S.
Termini	Frankford Transit Center 69th Street Transit Center
Stations	28
Website	septa.org/schedules/L1
Service
Type	Rapid transit
System	SEPTA Metro
Services	All Stops
Operator(s)	1907–39: Philadelphia Rapid Transit Company 1940–68: Philadelphia Transportation Company 1968–present: SEPTA
Daily ridership	107,651 (FY 2023)[1]
History
Opened	March 4, 1907 (1907-03-04)
Technical
Line length	12.9 miles (20.76 km)
Number of tracks	2
Character	Elevated and underground
Track gauge	5 ft 2+1⁄4 in (1,581 mm) Pennsylvania trolley gauge
Electrification	Third rail, 700 V DC[2] (previously 600 V DC)
Operating speed	19 mph (31 km/h) (avg.) 55 mph (89 km/h) (top)
Route map Show interactive map Legend Frankford Yard Frankford Transit Center Arrott Transit Center Church Frankford Creek Erie–Torresdale Northeast Corridor Delair Branch Tioga Kensington–Allegheny Somerset Conrail Richmond Industrial Track Huntingdon York–Dauphin Berks Front–Girard I-95 Spring Garden PATCO to Lindenwold 2nd Street 5th Street/Independence Hall 8th–Market PATCO PATCO to 15–16th & Locust SEPTA Main Line to Glenside Jefferson 11th Street 13th Street 15th Street/City Hall 15th Street/City Hall Suburban 19th Street 22nd Street Schuylkill River Northeast Corridor 30th Street Drexel Harrisburg Subdivision NEC/Keystone Corridor 32nd Street Tunnel 33rd Street 34th Street 36th Street Portal 36th–Sansom 37th–Spruce 40th Street Portal 40th Street diverted trolleys only | 46th Street 52nd Street 56th Street 60th Street 63rd Street Cobbs Creek Millbourne 69th Street Transit Center to Orange Street/Media & Chester Pike/Sharon Hill 69th Street Yard to Norristown Transit Center Underground concourse/transfer station Free transfer between services Out-of-system transfer between services Surface buses connect at all stations except Millbourne This diagram: view talk edit Show route diagram map

The L,^[a][4] formerly known as the Market—Frankford Line,^[b] is a rapid transit line in the SEPTA Metro network in Philadelphia, Pennsylvania, United States. The MFL runs from the 69th Street Transit Center in Upper Darby, just outside of West Philadelphia, through Center City Philadelphia to the Frankford Transportation Center in Near Northeast Philadelphia. Starting in 2024, the line was rebranded as the "L" as part of the implementation of SEPTA Metro, wherein line names are simplified to a single letter.

The L is the busiest route in the SEPTA system; it had more than 170,000 boardings on an average weekday in 2019.^[6] The line has elevated and underground portions.

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