Bothell Crossroads SR 522 Realignment
The largest municipal downtown project in Washington state's history
City of Bothell
Roadways & Bridges
The Bothell Crossroads project realigned State Route 522 to the south between Hall Road and 102nd Avenue NE. The highway consists of two travel lanes in each direction, left turn lanes, and sidewalks separated from traffic by tree-lined medians. Connecting Streets (NE 180th St, 98th Ave NE, and SR 527) were extended to reach the new alignment – creating three new intersections (two signalized), and providing pedestrians additional opportunities to move between downtown and the Park at Bothell Landing. The intersection at SR 522/SR 527 previously performed poorly and was expected to degrade further without action. Today, over 44,000 vehicles pass though this intersection daily and this project improved traffic congestion and safety on this critical commuter and freight corridor.
Work included signals, lighting, sidewalks and pedestrian railings, paving, landscaping, utilities, and a cast-in-place fascia wall that provides an aesthetic gateway to the City of Bothell. In addition, a future project will re-channel Horse Creek under SR 522. To eliminate the need to dig up the just completed roadway, Atkinson installed a precast box culvert that is sealed on both ends and already contains the streambed gravel. This will allow the future contractor to break off the ends of the box and extend it without impacting SR 522. This forward compatible feature minimizes cost, schedule, and traffic impacts when the Bothell Downtown Revitalization Plan is fully implemented.
At the start of the project, and in collaboration with the City of Bothell, we designated work zones/streets as either night work or day work areas. Work in areas that affected traffic was performed at night during off-peak hours to minimize lane closures and construction distractions/impacts during commute hours. Work performed near residential areas was performed during the day to minimize impacts to resident’s quality of life.
This project also represents [another] major milestone in revitalizing our historic downtown. Crossroads is part of a multi‐year effort to redevelop downtown with new residential, retail, office, mixed‐use and an expanded park system.
Mark Lamb, Former Mayor, City of Bothell