22nd Street station is an underground trolley station in Center City, Philadelphia that serves the SEPTA Subway–Surface Trolley Lines. Similar to 19th Street station, three blocks east of it, the station has two side platforms and a total of four tracks. The station serves only subway–surface trolleys on the two outer tracks; the Market-Frankford Line subway uses the two inner tracks and bypasses the station as it travels between 15th Street and 30th Street station.

Route 11, also known as the Woodland Avenue Line, is a trolley line operated by the Southeastern Pennsylvania Transportation Authority (SEPTA) that connects the 13th Street station in downtown Philadelphia, Pennsylvania, to Darby Transportation Center in Darby, Pennsylvania. It is one of five lines that are part of the subway–surface trolley system. Sitting at an average of 13,580 riders per weekday in 2019, it is the most used subway-surface trolley route, even though it lacks overnight service. From 2024 onwards, this route will be referred as T4 Woodland Avenue Line.