Route 10, also known as the Lancaster Avenue Line, is a trolley line operated by the Southeastern Pennsylvania Transportation Authority (SEPTA) that connects the 13th Street station in Center City Philadelphia, Pennsylvania, to the 63rd Street–Malvern Avenue station in the Overbrook section of West Philadelphia. It is one out of five lines that is part of the SEPTA's subway–surface trolley system and is long. It is the least used subway-surface trolley line, but unlike Route 11, the most used subway-surface trolley line, it has overnight service. Route description Starting from its eastern terminus at 13th Street, Route 10 runs in a subway tunnel under Market Street. It has underground station stops at 15th Street, 19th Street, 22nd Street, 30th Street, and 33rd Street. From 15th to 30th Streets, it runs on the outer tracks of the Market Street subway tunnel used by SEPTA's Market–Frankford Line. Passengers may transfer free of charge to the Market–Frankford Line at 13th Street, 15th Street, and 30th Street and to the Broad Street Line at 15th Street. Connections to the SEPTA Regional Rail can be made at 30th Street. There is an underground passageway that connects the ex-Pennsylvania Railroad's 30th Street Station to the Market–Frankford Line's 30th Street subway station, but this has long been sealed off due to high crime. An underground passageway continues to serve between the 13th and 15th Streets stations and Jefferson Station and Suburban Station, respectively. Route 10 exits the subway at the 36th Street Portal, where as the other subway–surface routes (11, 13, 34, and 36) surface at the 40th Street Portal. Route 10 then runs north on 36th Street, passing the former University City High School (now demolished) and University City Science Center as it approaches Lancaster Avenue (US 30). At Lancaster Avenue there is a wye cutback, which at one point connected to the former subway–surface trolley Route 38 to Lancaster Avenue when the Route 10 Line continued straight down Lancaster Avenue to Market Street, where it connected to a now-closed subway entrance at 23rd & Market Streets. Continuing northwest on Lancaster Avenue, the Route 10 line crosses over 40th Street, where there is a southbound track which diverts Route 10 to 40th & Market Streets MFL station when the trolley subway tunnel is closed. At 41st Street there is a northbound track by which Route 10 returns from 40th & Market Streets Station. The tracks on