Interstate 405 (Washington)

Interstate 405 (I-405) is an auxiliary Interstate Highway of I-5 located in the Seattle region of Washington, United States. It goes north-south as it bypasses Seattle east of Lake Washington, going through the Eastside area of King and Snohomish counties. The 30-mile (48 km) highway goes through the cities of Renton, Bellevue, Kirkland, and Bothell. I-405 also intersects a lot of other major highways, including I-90, Washington State Route (SR) 167, SR 520, and SR 522. I-405 is one of the busiest highways in the state, and is often the most busiest during peak travel times, leading to long traffic delays for travelers.

I-405 marker

I-405

Route information
Length30.30 mi[1] (48.76 km)
Existed1957–present
NHSEntire route
Major junctions
South end I-5 / SR 518 in Tukwila
Major intersections
North end I-5 / SR 525 in Lynnwood
Location
CountryUnited States
StateWashington
CountiesKing, Snohomish
Highway system
  • State highways in Washington
  • Interstate
  • US
  • State
  • Scenic
  • Pre-1964
  • 1964 renumbering
  • Former
SR 401SR 409

References

  1. "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". Federal Highway Administration. December 31, 2016. Retrieved December 22, 2017.
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