Until 1987, when Greyhound Lines acquired Continental Trailways (part of the Trailways Transportation System), there were two systems of intercity buses - Greyhound and Trailways - in Northern Virginia.
Until 1987, when Greyhound Lines acquired Continental Trailways (a component of the Trailways Transportation System), there were two distinct networks of intercity buses - Greyhound and Trailways - operating in Northern Virginia.