FAQs

WSDOT is building express toll lanes on I-405 and SR 167 because they:

• Operate efficiently, moving more people and offering a more reliable trip.
• Manage demand to improve speed and reliability.
• Strategically add capacity to increase throughput.
• Reduce congestion, improving mobility for transit, freight, and drivers in all lanes.
• Generate revenue for future corridor improvements by charging a user fee for non-carpool vehicles to use the express toll lanes.

Over the next two years, travelers across Greater Puget Sound will see an unprecedented level of construction activity. This is not the result of a single project, but the cumulative effect of major efforts moving forward at the same time.  

From I-5 and I-405 to SR 520, I-90 and key freight and commuter routes, major corridors across the region will have overlapping construction. This isn't so much a temporary spike or a single busy season as it is a sustained construction era.

The region's transportation system is at a tipping point. Much of the infrastructure is old, overstressed, and operating beyond what it was designed to handle. Meanwhile, our region's population continues to grow. We need to support that growth safely and strategically. That means adding capacity to our roads, improving access and strengthening transit connections.

The three major I-405 projects currently in construction: I-405/Brickyard to SR 527 Improvement Project, I-405/Northeast 85th Street Interchange and Inline BRT Station Project and I-405/Renton to Bellevue Widening and Express Toll Lanes Project, all have critical work that we must complete to deliver these projects.

Read more about regional construction impacts on the WSDOT blog: Why so much construction in Puget Sound: What to know about I-5, I-405, SR 520 and more through 2028