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State and county outline multi‑year plan to rebuild I‑5/179th interchange with roundabouts, bridges and shared paths
Summary
WADOT and Clark County presented designs to replace signals with roundabouts, replace bridges, add shared‑use paths and address fish passage. Design work is underway in 2025 with construction expected to be advertised in 2028 and start in 2029; noise impacts will be evaluated during environmental review.
WADOT representatives told the Fort Creek Neighborhood Association that the I‑5/179th interchange project is primarily a mobility and safety effort that would replace two existing traffic signals with roundabouts, replace two bridge spans, raise I‑5 by approximately four to five feet, and add shared‑use paths and new drainage and lighting.
"The goal of the project is to improve safety and mobility at this interchange by replacing the two existing signals with roundabouts," said Sarah Hannah Nine, communications lead for the WADOT Southwest Region, summarizing the agency's design intent. She said roundabouts reduce the most serious crashes, allow continuous traffic flow, and can be designed with truck aprons so freight can navigate the circles.
WADOT described a multi‑phase schedule the…
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