View of position color light signals on the <a href="https://en.wikipedia.org/wiki/Amtrak" class="extiw" title="w:Amtrak">Amtrak</a> <a href="https://en.wikipedia.org/wiki/Philadelphia_to_Harrisburg_Main_Line" class="extiw" title="w:Philadelphia to Harrisburg Main Line">Philadelphia to Harrisburg Main Line</a> (part of the Keystone Corridor), east of <a href="https://en.wikipedia.org/wiki/Lancaster,_Pennsylvania" class="extiw" title="w:Lancaster, Pennsylvania">Lancaster, Pennsylvania</a>. Looking eastbound toward Philadelphia. Signals were converted from <a href="https://en.wikipedia.org/wiki/Pennsylvania_Railroad" class="extiw" title="w:Pennsylvania Railroad">PRR</a> position lights (single-color).
<a href="//commons.wikimedia.org/w/index.php?title=User:Caseyjonz&amp;action=edit&amp;redlink=1" class="new" title="User:Caseyjonz (page does not exist)">Caseyjonz</a>
<span class="int-own-work" lang="en">Own work</span>