Stride S2 Line

Adding new bus rapid transit service along I-405 between Lynnwood and Bellevue
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Stride S2 Map

Project updates

Like many agencies nationwide that are balancing transit operations and mega-project capital expansions, Sound Transit faces rapidly escalating costs in nearly every area of its work.  

The “Enterprise Initiative” is Sound Transit’s comprehensive effort aimed at delivering the maximum benefits of ST3 within available financial resources. As part of this effort, the Sound Transit Board is evaluating different approaches to updating the ST3 System Plan in summer 2026, which may include new ways to build, phase, or sequence projects.

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Overview

The Stride S2 Line will connect communities along I-405 from Bellevue to Lynnwood. Like all Stride lines, buses on the S2 Line will run every 10 to 15 minutes, 17+ hours per day, seven days a week. The S2 Line will connect to Link light rail stations at Lynnwood City Center and Bellevue Transit Center and provide seamless transfers to transit services provided by Sound Transit, Community Transit, and King County Metro. The program includes seven Stride stations with plans to add parking by 2035 at the existing Kingsgate Park and Ride for the new Totem Lake Station in Kirkland.

As part of the Washington State Department of Transportation (WSDOT) I-405 Master Plan, the S2 Line will benefit from improvements to the highway for faster travel. In partnership with WSDOT, we aim to improve community safety, transit access, and the travel experience within the I-405 corridor. WSDOT and partner projects in the region are building portions of the Stride system to invest in transportation and pedestrian improvements ahead of Stride service beginning.

The Stride S1 and S2 fleets will consist of double-decker battery-electric buses, as shown in the graphic below.

Rendering of Stride double-decker bus’s side profile. The bus exterior includes stripes as well as the Sound Transit and Stride logos. The right side of the bus has two doors for access, one at the front and one in the middle of the bus.