• Study

SR 507 Roundabout Pre-design Study

Planning study news

Thank you for participating in the SR 507 and Vail Road Roundabout Pre-design Study. The study is now complete and will move into the design and construction phases.

November 2022 - April 2023
$2 - 3 million is the estimated cost for design and construction.


Each year, WSDOT looks at all rural stop-controlled intersections on our state highways to identify ways to reduce potential crashes. For some intersections, WSDOT develops a safety plan that outlines ways to manage travel speeds and reduce conflict points.

As a result of a recent safety plan, WSDOT is proposing a single-lane roundabout on SR 507 at the Vail Road intersection near Yelm.

This roundabout fits within WSDOT’s existing property. If the roundabout concept is finalized, construction may begin in early 2026.

The proposed single-lane roundabout has an eastbound left-turn lane, a center and raised islands with raised and drivable surfaces. This feature allows the roundabout to accommodate vehicles of all sizes.

SR 507 and Vail Road study area map.