L (SEPTA Metro)
SEPTA rapid transit line in Philadelphia, Pennsylvania
The L, formerly known as the Market–Frankford Line, is a rapid transit line in the SEPTA Metro network in Philadelphia, Pennsylvania, United States. The L runs from the 69th Street Transit Center in Upper Darby, just outside of West Philadelphia, through Center City Philadelphia to the Frankford Transit 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 125,000 passengers on an average weekday in fiscal year 2025. The line has elevated, on-grade, and underground subway portions.
Route
The L begins at 69th Street Transit Center in Upper Darby. The L then heads east at ground level and passes north of the borough of Millbourne. From there, it enters West Philadelphia and is elevated over Market Street until 46th Street, where it curves north and east and then descends underground via a portal at 44th Street. At 42nd Street, the tunnel returns to the alignment of Market Street.
At 32nd Street, the tunnel carrying the T routes join the L tunnel.
This brief starts where responsible research should: with the source description of “L (SEPTA Metro)” as sEPTA rapid transit line in Philadelphia, Pennsylvania. Everything that follows is an evidence route, not borrowed authority.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 19, 2026. The linked authority identifier is Q823251. Authority coordinates are 39.950, -75.144. None of the 1 selected statements returned an explicit reference. The first chronological checks are 2024 and 2025.
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This entry incorporates text from “L (SEPTA Metro)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.