The Market-Frankford Line (MFL) (also called the Market-Frankford Subway-Elevated Line (MFSE), El or Blue Line) is a rapid transit line in Philadelphia, Pennsylvania, operated by Southeastern Pennsylvania Transportation Authority.
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/ZRVUkBHCE0RV5L4E5DaVcA== | 5.88129e-14 |