Stride bus rapid transit
Connecting all of I-405, from Lynnwood to Burien

Timeline and milestones

  • Voter approval (2016)

  • System Planning (2014 - 2016)

    • Commuters, community members and stakeholders help shape the project. Public meetings gather feedback and provide updates. Outreach to local cities and counties provide critical input.
    • Representative projects are developed indicating transit mode, approximate route, number of stations and general station locations. Representative projects and funding are approved by public vote in 2016.

    BRT representative project refinements (current phase): 2018 – early 2019

    • Sound Transit evaluates and refines voter-approved representative project for I-405 BRT and hosts public involvement opportunities to discuss BRT stations, parking facilities, transit centers, roadway improvements and BRT branding.
    • After reviewing technical analysis and public input, Sound Transit Board of Directors advances a proposed project into conceptual engineering and environmental review.

    Environmental review and conceptual engineering: 2019

    • Sound Transit begins developing conceptual engineering level designs for stations, transit centers, parking facilities and roadway improvements.
    • Environmental review is conducted.
    • Public involvement opportunities gain input on design concepts and environmental studies.
    • After reviewing the BRT design concepts, environmental studies and public input, Sound Transit Board of Directors selects project to be built.
  • Design (2020-2023)
    We are here

  • Construction of some elements is likely to continue after service starts in 2026.

  • Open for service (2026 and 2027*)

*On Aug. 5, 2021, the Sound Transit Board adopted a realigned capital plan to address steeply rising construction and real estate costs affecting many voter-approved regional transit expansion projects. Based on current revenue projections and cost estimates, the Board’s adopted plan identifies:

  • 2026 as the timeframe we can afford to open service on the I-405 Stride BRT south line from Burien to Bellevue (the S1 Line), and complete construction of the NE 85th station on the north line.
  • 2027 as the timeframe we can afford to open service on the I-405 north line from Bellevue to Lynnwood (the S2 Line). 

In order to focus available financial capacity on expediting Stride openings, the Board identified later targets for opening the three planned parking improvements associated with the I-405 BRT project: 

  • Expanded parking at the existing Kingsgate Park and Ride – scheduled for 2035
  • New parking at NE 44th and at South Renton Transit Center – scheduled for 2034