- Scoping Summary Report WSDOT published the I-90 Scoping Summary Report summarizing the comments received during the most recent outreach in October and November 2013.
- Mercer Island I-90 travel survey results
In November 2013, WSDOT conducted a survey of Mercer Island residents and business to gather information about their travel patterns. Survey results are now available.
The data received from this survey, along with traffic counts from Mercer Island ramps, will help identify potential effects that different proposed I-90 tolling options would have on those that live and work on Mercer Island.
The Cross Lake Washington Corridor is made up of the I-90 and SR 520 bridges, two parallel highways that operate as one system to connect the region’s major employment and population centers over a 22-mile long body of water.
Why is WSDOT
pursuing this project?
The Legislature directed WSDOT to study tolling I-90 to manage traffic across Lake Washington and provide funding for construction of the unfunded SR 520 Program from I-5 to Medina.
WSDOT is currently conducting a Environmental Impact Statement to determine the potential environmental, social and economic effects of tolling I-90 between I-5 and I-405.
WSDOT needs roughly $1.4 billion to complete the I-5 to Medina: Bridge Replacement and HOV Project that would replace the vulnerable Portage Bay and southwest bridge approach structures. Additionally, traffic on I-90 has increased by 15,000 vehicles a day since SR 520 tolling began in December 2011.
The End Result
Revenue from I-90 tolls could fund the necessary improvements on SR 520 between I-5 and Medina, allowing for a safer, more reliable Cross Lake Washington Corridor.
Washington is one of 15 states participating in the federal Value Pricing Pilot Program, which encourages states to test and implement tolling to manage highway congestion and generate revenue to construct needed improvements.
- Move More People - Completes the HOV system on SR 520 to complement two-way transit and light rail on I-90.
- Improves Safety - Replaces the vulnerable Portage Bay bridge and SR 520 west approach structures.
- Provides a Reliable Trip - Variable tolling enhances operations to increase reliability.
What is the project timeline?
- Late 2014/Early 2015: FHWA and WSDOT publish Draft Environmental Impact Statement (DEIS); DEIS public comment period and hearings
- FHWA and WSDOT publish Final Environmental Impact Statement
- Legislature considers I-90 toll authorization
- Record of Decision
The I-90 Tolling Project’s environmental study is funded with $8.32 million of federal and state funding.
For more information on SR 520 Program financing, visit SR 520 Costs, Funding and Tolling.
How can I get more information?
Emily Pace, WSDOT
Sign up for email updates on the I-90 Tolling Study
back to top