However; in September, 2000, the "Twinbrook - Silver Spring" Line was discontinued, due to the fact that much of the route was simply redundant to the segment of the Q2 , Y7, Y8, & Y9 Metrobus routes' routing between the Silver Spring & Wheaton Metro Stations, as well as the segment of the C4 Metrobus route's routing between the Wheaton & Twinbrook Metro Stations.