sound transit express is a network of 28 limited-stop express bus routes providing regional service to cities in all three counties, primarily using a network of high-occupancy vehicle lanes (hov lanes) on state-maintained freeways. some routes operate seven days a week, while others are limited to rush hours only. the bus fleet is owned by sound transit and buses are operated and maintained under contracts with local transit authorities (community transit, king county metro, and pierce transit).