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This section of SR 522 experiences severe congestion and operational problems due to high traffic volumes. This project will improve the safety and capacity of the existing two-lane roadway by constructing two additional lanes on a separate alignment to form a four-lane divided highway from the Snohomish River Bridge to US 2 in the city of Monroe. Bridges will be constructed at High Bridge Road, Snohomish River, 164th Street, 154th Street, and US 2. The traffic signal at the US 2 westbound ramp will be modified and a roundabout will be constructed at the 164th Street westbound ramp. Right of Way will be purchased for roadway, detention pond, and wetland mitigation construction. The project also includes retaining wall, guardrail, storm sewer, fish passage, wildlife crossing, landscaping, signing, illumination, Intelligent Transportation System and paving work.
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