As a kid in Westmont, I played on and near the PRR between Cooper River and Maple Ave. All the trains that I remember were PRSL trains from Philly to Haddonfield and shore points.
I played on and under the trestle over Cooper River, subsequently replaced by this bridge
http://community.webshots.com/photo/870 ... 4172lbBjuM
and on and under the Maple Avenue bridge, seen here:
http://community.webshots.com/photo/501 ... 0865pcCHVX
The Maple Ave bridge has since been replaced.
I never saw a freight train along those PRR tracks; only passenger trains pulled by PRR and Reading steam engines, until some Baldwin diesels started to appear.