SEPTA's Silverliner IV, featuring the Pennsylvania Railroad (PRR) scheme, may seem anachronistic, but the PRR symbol holds significant historical value for SEPTA. The Silverliner IV, introduced in the 1970s, was crucial in modernizing Philadelphia's commuter rail service. Initially these were delivered with Penn Central and Reading logos, these trains symbolize the transition from the old private railroads to SEPTA's current operations.

The PRR symbol, especially prominent on the Silverliner IV, represents a bridge between eras. This blend of history and modernity showcases SEPTA's evolution while honoring its roots in Pennsylvania's rich railroad heritage