The Purple Line is a light rail system connecting Metro Rail Stations in Montgomery County and Prince George's County. It was originally supposed to open in 2022 but delays have now pushed the opening date to 2027. More at https://en.wikipedia.org/wiki/Purple_Line_(Maryland)#:~:text=In%202022%2C%20state%20officials%20said,would%20open%20in%20fall%202026.