The B Line is one of eight RapidRide lines (routes with some bus rapid transit features) operated by King County Metro in King County, Washington.
The B Line began service on October 1, 2011,[2] running between downtown Redmond, Overlake and downtown Bellevue.
[3] Unlike most of the RapidRide lines, the B Line does not offer scheduled service during late-night and early morning hours.
This corridor was previously served Metro routes 230 and 253[3] which carried a combined average of 5,070 riders on weekdays during the last month in service.
[4] Since the implementation of RapidRide on the corridor, ridership has grown 30 percent and the B Line served an average of 6,600 riders on weekdays in spring 2015.