They are constructing it right now the expansion between bellevue to renton. https://wsdot.wa.gov/construction-planning/search-projects/i-405renton-bellevue-wi

They are constructing it right now the expansion between bellevue to renton. https://wsdot.wa.gov/construction-planning/search-projects/i-405renton-bellevue-widening-and-express-toll-lanes-project https://wsdot.wa.gov/construction-planning/search-projects/i... The bellevue to lynnwood section was already 'expanded' a decade ago though as one can tell, it still has traffic. They're opting to increase the tolls now.