Possible Purple Line substation house. MTA photo.

The Purple Line is a proposed 16-mile light rail corridor. Once completed, it will link suburban communities north of the nation’s capital in Maryland’s Montgomery and Prince George’s counties. First proposed more than a decade ago, state officials breathed new life into the project in 2007 to connect Metro transit stations in New Carrolton and Bethesda as well as the business districts between the two communities.

Planning for the project, including engineering and environmental studies, are underway. Construction could begin as early as 2015 if funding is secured.

Purple Line route. MTA map.

The Purple Line will require multiple support structures and buildings, including 18 power substations, 14 signal bungalows (small buildings with radio and signal equipment), and a nine-story ventilation tower in Bethesda’s central business district. Residents who live along the proposed alignment told the Washington Post that they are concerned about potential impacts from the power facilities known as traction power substations. Continue reading →