[Update: corrected an error in the matrix of travel times at the end of the post, where the matrix previously miscounted the transfers in the representative project. Also updated the associated text in the paragraph just above].
Work has begun on SR 522 BRT, with the first BAT lanes in Bothell coming online in late 2020, and Sound Transit’s Stride BRT service opening in 2024. Although phase 1 design recently concluded and the project is now entering the Conceptual Engineering and Environmental process, planners continue to evaluate how to serve the low-ridership Woodinville segment.
The BRT extends from the Shoreline Link rail station along NE 145th where Sound Transit will add bus queue bypasses and signal priority for transit at key intersections. On SR 522, the patchwork of existing BAT (business access & transit) lanes will be filled in to create an uninterrupted lane for transit from 145th to Bothell. In Bothell, the BRT is likely to operate on downtown streets, serving UW Bothell and connecting to I-405 BRT at NE 195th St.
Beyond that, there is a 3.5-mile segment to the Woodinville Park & Ride where the planned service is more basic. The ST3 plan does not fund any capital improvements east of I-405 and the buses operate in general purpose freeway lanes on I-405 and SR 522. The 10-minute headways west of I-405 drop to every 20 minutes into Woodinville.
Expectations for ridership on the Woodinville segment are low. Sound Transit models suggest 8,800 daily boardings on the BRT in 2042, of which just 100 are at the Woodinville stop.