Metrorail Diagram Is Relic From Yesteryear When NoMa, Penn Quarter Didn't Exist (PHOTOS)

WASHINGTON -- Do you remember when Yellow Line trains didn't go north of Mount Vernon Square, a time where "Penn Quarter" and "Ronald Reagan" were not part of Metrorail station identities ... a time when the Blue Line extension to Largo Town Center was just a dashed line on the map?

While riding the Red Line on Monday evening in rail car No. 1230, The Huffington Post looked over at the posted rail system diagram and noted it was more than a decade old. For that digram to survive a handful of updates over the past 10 years is amazing. But this map, like all others in the system, will be replaced in the upcoming weeks as Metro prepares to launch its new Rush-Plus peak rail service pattern in June.

A decade ago, the Orange Line was a slightly more pale orange, the system diagram was slightly less crowded and some station names were different.

While finding this earlier version of the Metrorail system digram originally designed by Lance Wyman might not be as exciting as stumbling upon remaining examples of the New York City subway's old Vignelli map, it is interesting to see how D.C.'s transit system has evolved in its minor and major ways over the past 10 years or so.

Click through the slideshow to see how our public transit system has changed.