I drew a very, very large map of the trolley system before it was dismantled. This is based on a 1940 original made by the privately-owned Philadelphia Transportation Co. : r/philadelphia
Philadelphia Trolley Tracks: 1953 Philadelphia Transit Map
Unofficial Philadelphia Rail Transit Map on Behance
SEPTA Trolley Route 102
Map of Philly's 1913 subway plan shows what public transit could have been - Curbed Philly
SEPTA subway–surface trolley lines - Wikipedia
Alstom Lands SEPTA Order for 130 LRVs - Railway Age
Route of the Week - 10 | SEPTA
SEPTA | Itinerant Urbanist
Lost in Philadelphia? Blame the SEPTA Signs - Bloomberg
Philadelphia Rapid Transit Map 1970s Style Includes SEPTA - Etsy
UrbanRail.Net > North America > USA > Pennsylvania > Philadelphia Subway and Elevated Railway