City Subway. Another fun custom sign, this one for the Public Service of New Jersey (later New Jersey Transit) "7 City Subway" at the 13th Street Station near City Hall. That route no longer carries that number, but is an active line equipped with modern light rail vehicles. On Saturday, September 16, 2023, 37-year SEPTA - iseptaphilly.com Trolley Operator Bill Monaghan Jr. retired. For his final trip, he operated a charter using SPAX 9096 (Kawasaki, 1981) to benefit Friends of Philadelphia Trolleys, an organization that Bill and others founded in 2003 to help preserve the legacy of Philadelphia electric traction.