SR 522 Stage 3

This project is a continuation of the SR 522 Stage 1 and Stage 2 improvements. It will provide road improvements and business access and transit (BAT) lanes from the end of Stage 1 and 2 improvements to 83rd Place NE (the new western City limits). This stage of the project is part of the Sound Transit SR 522/NE 145th Bus Rapid Transit (BRT) project that will widen the existing lanes of SR 522 and create Business Access and Transit (BAT) lanes in both directions. Additionally, this project will add a sidewalk on the north side, install center medians and street lights, and relocate utilities underground.

​Background and community benefits


Transit speed and reliability would be improved with the installation of BAT lanes where none currently exist. This would support the vision of downtown Bothell as a transit-friendly urban core. Installation of a sidewalk on the north side of the highway would allow the neighborhoods to access intersections along SR 522 and cross the regional trail system. This would promote pedestrian and bicycle usage.

 The Sound Transit 3 ballot measure allocated funding for this project. The City held a Public Hearing regarding an appeal of the State Environmental Policy Act (SEPA) threshold determination for this project on August 18, 2016.  Read the notice.

The design and right-of-way (ROW) phases of this project are complete. On March 19th, 2019, the City Council awarded a construction contract to Thomco Construction, Inc., the lowest responsive and responsible bidder.

Schedule


Construction is expected to begin in late April 2019.

Traffic Impacts


There will be significant impacts to vehicular traffic on SR 522, with daytime lane closures between 9 a.m. and 3 p.m., and night time lane closures from 9 p.m. to 5 a.m. Additionally, there will be an impact to Burke Gilman Trail users as the trail path may be reduced for two-way traffic, and on some occasions, alternating one way traffic with flaggers when necessary. Communications regarding traffic impacts will be ongoing throughout the project. 

Map

SR 522 Stage 3 Detailed Vicinity Map (2019)