I-90 Two-Way Transit & HOV Operations
The Washington State Department of Transportation (WSDOT) and Sound Transit are adding high-occupancy vehicle (HOV) lanes to Interstate 90 between Seattle and Bellevue. This project is adding outer HOV lanes in each direction, which will improve regional mobility. The center roadway has been set aside for Link Light Rail. WSDOT has also improved I-90 HOV access at Bellevue Way and will build new HOV on- and off-ramps on Mercer Island.
The WSDOT I-90 - Two-Way Transit and HOV Operations project is divided into three stages. The first two stages occur in Bellevue and were recently completed.
Stage 1: Completed in October 2008
- Added a new HOV lane in the westbound I-90 outer roadway between Mercer Island and Bellevue
- Built a new HOV direct access ramp at 80th Ave SE
- Modified the pre-existing Bellevue Way HOV direct access ramps for two-way transit operations
Stage 2: Completed in March 2012
- Mercer Island's 80th Ave SE ramp is functioning as an on-ramp to the eastbound I-90 outer roadway for carpools and buses only with direct access to a new HOV lane to Bellevue.
- Provided an HOV lane on eastbound I-90 between Mercer Island and Bellevue.
- Modified the existing reversible HOV ramp at 80th Ave SE on Mercer Island to a HOV on-ramp connecting directly to the new eastbound HOV lane.
- Extended the eastbound I-90 to I-405 auxiliary lane and modified the Bellevue Way & I-405 HOV direct access from the eastbound HOV lane.
Stage 3: Currently in final design
- Will add an HOV lane to the outer roadways in both directions between Rainier Ave in Seattle and the 80th Ave SE in Mercer Island.
- Will make improvements to the fire and life safety systems in the Mt. Baker tunnel and the Mercer Island lid.
- Will build an eastbound HOV direct-access exit ramp at 77th Ave SE on Mercer Island.