 All-day service for most of the island is provided by Metro Route 204, which is supplemented by Route 630 and several school bus routes during peak periods.In 2023, a light rail station at the park and ride facility will be opened by Sound Transit, providing service on the Blue Line to Seattle and the Eastside.The light rail line will replace several express routes on Interstate 90 and Mercer Island will function as a major bus–rail interchange.