It served as another connecting link , running from the Junction Railroad and PRR main line at Zoo interlocking east to the lines heading north from downtown .
The Connecting Railway , operated by the Philadelphia and Trenton Railroad , opened in 1867 .
Philadelphia served as another connecting link , running from the Junction Railroad and PRR main line at Zoo interlocking east to the lines heading north from downtown .
The Connecting Railway , operated by the Philadelphia and Trenton Railroad , opened in 1867 .