An interesting post over at Greater Greater Washington by long-time Transit Maps contributor Matt’ Johnson: a clickable interactive map that displays the location of each of the different architectural styles at stations. (That’s eleven defined styles, plus a category for those few stations that are unique). The “waffle” vaulting at underground stations may be the iconic style in most people’s minds, but there’s definitely more to be seen than just that! Even the map above gives a great idea of how the architecture evolved (for reasons of both cost and changing architectural tastes) as the system has expanded over the years: a unified central core of the original “waffle” style, with increasing diversity out along the (newer) branch lines. Matt’ promises an animated chronological map tomorrow, which sounds excellent.

Source: Greater Greater Washington