Title: Interstate 405 (Washington) - Wikipedia
Headings: Interstate 405 (Washington)
Interstate 405 (Washington)
Contents
Route description
Tukwila to Bellevue
Bellevue to Lynnwood
History
Corridor program
Transit service
Exit list
References
External links

Content: since then, the highway has been expanded to add lanes for high-occupancy vehicles and toll users. I-405 is one of the most congested highways in the Seattle area and is known for its meandering "S-curves" through Renton, which were straightened in the 1990s. Contents
1 Route description
1.1 Tukwila to Bellevue
1.2 Bellevue to Lynnwood
2 History
2.1 Corridor program
3 Transit service
4 Exit list
5 References
6 External links
Route description
I-405 is a 30-mile (48 km) north–south freeway that serves as a bypass of I-5 through Seattle while serving the Eastside region. It is listed as part of the National Highway System, identifying routes that are important to the national economy, defense, and mobility, and the state's Highway of Statewide Significance program, recognizing its connection to major communities. The highway is maintained by the Washington State Department of Transportation (WSDOT), who conduct an annual survey of traffic volume that is expressed in terms of average annual daily traffic (AADT), a measure of traffic volume for any average day of the year. Average daily traffic volumes on I-405 in 2016 ranged from a minimum of 76,000 at its southern terminus in Tukwila to 209,000 in Downtown Bellevue. Approximately 86 percent of peak-direction lane miles on I-405 are rated as "routinely congested" by WSDOT and the highway accounted for over 30 percent of delays on the Seattle area's urban freeways from 2013 to 2017. The freeway has a system of high-occupancy vehicle lanes (HOV lanes) from Tukwila to Downtown Bellevue that become high-occupancy toll lanes (HOT lanes) from Bellevue to Lynnwood. The HOT lanes are controlled through a series of designated access points and direct ramps located along I-405. Tolls are collected electronically through Good to Go transponders by overhead sensors or via license plate cameras for mail billing with a surcharge.