It's doubtful that there is anyone who doesn't know that Philadelphia is the birthplace of our nation--essentially the birthplace of liberty--and, of course, the home of the Liberty Bell. This was the inspiration for our convention logo. Visible within the logo is a green diamond and a red keystone. The keystone is recognizable to any model railroader--it represents the Pennsylvania Railroad--and its implementation here depicts how it would typically appear at the front of a steam locomotive or GG1.
The diamond represents the Reading Company, a class one railroad renown for carrying record amounts of anthracite coal and serving primarily the southeast sector of Pennsylvania, as well as a bridge line to all of the surrounding states. While green was certainly a color the Reading used, the diamond itself was seldom green--we just thought it would look good and contrast well against the dark Pennsy green color of the bell.
The horizontal lines call to mind the lines of lettering on the bell and the lines used on the Pennsy GG1s.
What both railroads share in common is having been headquartered in Philadelphia for nearly a century (prior to mergers) and having served the area not only in freight service, but with an extensive web of commuter service.
On the header of the website you'll see two photos. The one on the left is a classic photo of the PRR's legendary GG1 electric motor rumbling through the city hauling a freight. The photo on the right is that of a Reading multiple-unit commuter car parked at Reading Terminal in downtown Philadelphia.
Residents of the area back in the last century would often see both older heavyweight cars as well as newer streamlined cars on both railroads. In addition, the Reading (concurrent with electric service) used steam first, then diesel locos hauling passenger cars on certain lines. These were later replaced by Rail Diesel Cars.
The green and yellow menu stripe across the top of the website is designed to call to mind the same colored stripe on the side of Reading F-units. The maroon and gold areas in the sidebars are reminiscent of the stripes and colors on Pennsy passenger F-units and GG-1s. On some of the web pages you'll find link buttons in the form of blue or red-orange boxes. These represent stations signs of the Reading and PRR respectively.