I-405 - Renton to Bellevue Widening and Express Toll Lanes - Downtown Bellevue - Environmental Assessment - Overview

Map of I-405 Express Toll Lanes in the Downtown Bellevue vicinityThe Environmental Assessment for the I-405, Downtown Bellevue Vicinity Express Toll Lanes Project studies the roadway, structural, trail and transit improvements for a 2.7-mile section of I-405 located in Bellevue from just north of I-90 (Milepost 11.9) to just north of the Northeast Sixth Street interchange (Milepost 14.6). 

Project context
WSDOT plans to build the I-405, Downtown Bellevue Vicinity Express Toll Lanes Project as part of a larger construction contract known as the I-405 Renton to Bellevue Widening and Express Toll Lanes Project, which extends south to I-5 in Tukwila. 

Major project features

  • Implementing two express toll lanes in each direction from just north of the I-90 interchange to the NE 6th Street interchange, with a single express toll lane for approximately 0.2 miles adjacent to the NE 6th Street ramps in downtown Bellevue. 
  • Widening the northbound off-ramp to SR 520 from two lanes to three lanes.
  • Making overpass and bridge improvements at Main Street and SE 8th Street, as well as a new northbound I-405 bridge adjacent to the existing southbound I-405 bridge over the Eastside Rail Corridor Regional Trail.
  • Constructing a new bridge for bicycles and pedestrians over southbound I-405 and a section of trail to connect with the Eastside Rail Corridor Regional Trail.

Purpose of the project and projected benefits:

  • Providing a reliable trip choice for I-405 users
  • Increasing vehicle capacity and person throughput
  • Improving reliability of transit
  • Reducing project-wide congestion
  • Improving safety performances

 

Continue reading about the key findings of the Environmental Assessment.