The route originates from the Center City Rail tunnel, and the two-track line splits off from the "SEPTA Main Line" north of North Broad Station. It then goes through Philadelphia's East Falls and Manayunk neighborhoods and Conshohocken, Pennsylvania before reaching Norristown. At Norristown Transportation Center, commuters can transfer to regular SEPTA surface buses or the SEPTA Norristown High Speed Line to 69th Street Terminal. From Norristown Transportation Center, the electrified line follows the single track Stony Creek branch to terminate at Elm Street, while the double tracked main line continues to Reading. The Reading main west of Norristown currently carries no passenger service, and is owned and operated by the Norfolk Southern Railway.
The Manayunk/Norristown Line was the Reading Company's Norristown Branch from Philadelphia to Reading, Pennsylvania. Electrified service to Norristown and Chestnut Hill East began on February 5, 1933. Steam (and later diesel)-operated intercity services continued to operate beyond Norristown. By the 1960s Budd Rail Diesel Cars handled most of the Reading's diesel services, although the Reading's EMD FP7 locomotives, displaced from the Crusader, saw regular use on the Philadelphia–Reading run. SEPTA discontinued services beyond Norristown on July 26, 1981.
Between 1984–2010 the route was designated R6 Norristown as part of SEPTA's diametrical reorganization of its lines. Manayunk/Norristown Line trains operated through the city center to the Ivy Ridge Line (later Cynwyd) on the ex-Pennsylvania side of the system.The R-number naming system was dropped on July 25, 2010.
Like the Cynwyd Line, the Manayunk/Norristown Line was slated to become part of the planned new Schuylkill Valley Metro, but was to serve the King of Prussia Mall complex and the former Pennsylvania Railroad's Trenton Cut-Off line to Frazer, Pennsylvania. This was referred to by planners as the "Cross-County Segment." An extension of the Manayunk/Norristown Line, called the Norristown Extension, to Wyomissing is currently proposed, with funding to come through new tolls on U.S. Route 422.
Early in 2013, SEPTA began to undertake major operational improvements and physical rehabilitation on the Manayunk/Norristown Line. Central to this project is the replacement of the 80-year-old wayside automatic block signal system with one that displays only in the operating cab, and operates in both directions on both tracks, thereby allowing greater operational flexibility. Two new remotely controlled interlockings are being constructed to facilitate bidirectional operation, one at Miquon, the other in Norristown between the main station and the Ford Street crossing. An electrified storage track is also being constructed at Miquon to allow for temporary turnback of trains at that station, as the line is periodically subjected to flooding from the Schuylkill River around Spring Mill and Conshohocken. Ongoing replacement of the line's overhead catenary, most of which is 80 years old, will continue along with the signal replacement. Also occurring in conjunction with these projects are the replacement of crossties, renewal of grade crossing surfaces, and trimming of brush and trees alongside the right-of-way. The entire program is scheduled for completion in fall 2015, tying in with the FRA-mandated nationwide implementation of Positive Train Control (PTC) on American railroads by the end of 2015.
The Manayunk/Norristown Line makes the following station stops after leaving 30th Street Station; stations indicated with italics are closed. Weekday boardings are from FY 2013; data for Temple University and North Broad include all lines serving those stations.:95–96
|C||Spring Garden Street||Philadelphia|
|2.1||Temple University||3,028||All SEPTA Regional Rail lines|
|17.2||Norristown Transportation Center||848||Norristown||Norristown High Speed Line|
Former diesel service
Prior to July 26, 1981, RDC diesel trains operated north of Norristown to Reading and Pottsville. Until 2011, SEPTA had considering restoring service as far as Reading as part of the Schuylkill Valley Metro project. These plans are currently on hold. The following is a list of stations formerly served by SEPTA.
|4||21.5||Valley Forge||Valley Forge||Montgomery|
|10||89.1||Schuylkill Haven||Schuylkill Haven|
- "Fiscal Year 2016 Annual Service Plan" (PDF). SEPTA. June 2015. Retrieved August 13, 2016.
- Baer, Christopher T. (April 2015). "A GENERAL CHRONOLOGY OF THE SUCCESSORS OF THE PENNSYLVANIA RAILROAD COMPANY AND THEIR HISTORICAL CONTEXT: 1933" (PDF). Pennsylvania Railroad Technical and Historical Society.
- Woodland, Dale W. (December 2003). "SEPTA's Diesels". Railpace Newsmagazine. pp. 21–22.
- Williams, Gerry (1998). Trains, Trolleys & Transit: A Guide to Philadelphia Area Rail Transit. Piscataway, NJ: Railpace Company. p. 47. ISBN 978-0-9621541-7-1. OCLC 43543368.
- Vuchic, Vukan; Kikuchi, Shinya (1984). General Operations Plan for the SEPTA Regional High Speed System. Philadelphia: SEPTA. pp. 2–8.
- Lustig, David (November 2010). "SEPTA makeover". Trains Magazine. Kalmbach Publishing: 26.
- Hambright, Brett (December 12, 2010). "Decision near on Route 422 tolls". Reading Eagle. Retrieved December 12, 2010.
- Hambright, Brett (August 10, 2010). "Technology is making tolls (almost) painless". Reading Eagle. Retrieved December 12, 2010.
- "Manayunk/Norristown Line Shuttle Busing: An Explanation". SEPTA. Retrieved 18 March 2013.
- "SEPTA's Capital Program:Regional Rail Signal System Modernization Program" (PDF). Fiscal Year 2014 Capital Budget Proposal. Southeastern Pennsylvania Transportation Authority. Retrieved 29 March 2013.
- "Fiscal Year 2015 Annual Service Plan" (PDF). SEPTA. May 2014. p. 60. Retrieved August 13, 2016.
- "Fiscal Year 2014 Annual Service Plan" (PDF). SEPTA. May 2013. p. 44. Retrieved August 13, 2016.
- "Fiscal Year 2013 Annual Service Plan" (PDF). SEPTA. May 2012. p. 55. Retrieved August 13, 2016.
- "Fiscal Year 2012 Annual Service Plan" (PDF). SEPTA. July 2011. p. 94. Retrieved August 13, 2016.
- "Fiscal Year 2011 Annual Service Plan" (PDF). SEPTA. June 2010. p. 70. Retrieved August 13, 2016.
- "FY 2010 Annual Service Plan" (PDF). SEPTA. June 2009. p. 63. Retrieved August 13, 2016.