King County Metro will expand bus service across the county starting Aug. 29, with some of the largest improvements planned for South King County, according to Metro. Metro also will launch Metro Flex, an on demand transit service, in Auburn and Federal Way beginning Aug. 31. “This marks the single largest bus service investment in South King County in a generation,” King County Executive Girmay Zahilay said. The agency said riders can expect more frequent service, earlier morning trips, later evening service and more weekend service on several routes. Public Info Session will be Wednesday, Aug. 26Metro will host an online South King County public information session at 6 p.m. Wednesday, Aug. 26 – register here.