The Ninth Street Branch was an elevated railway line in Philadelphia, Pennsylvania.

As the line continued north along the Reading Viaduct, the City Branch, a freight-only route, diverged almost immediately.

[1] Up until the final conveyance to Conrail in 1976 the Philadelphia, Germantown and Norristown owned the portion between North Broad Street and Tabor Junction, while the Reading Company owned the line south from North Broad Street to the Reading Terminal.

Finally, at the urging of the City of Philadelphia, the Reading consolidated its passenger options on the PG&N route.

[3] The line north of Ninth and Green remained at street level and its grade crossings saw numerous accidents.

Again at the urging of the city, and after the route acquired the derisive sobriquet "Death Alley", the Reading elevated the entire branch.