Route description Interstate 405 (Washington)

i-405 heading downtown bellevue

factoria mall east of i-405 approaches full stack interchange interstate 90 provides access seattle, mercer island, eastgate neighborhood of bellevue , issaquah. mercer slough west of i-405 heads towards downtown bellevue. 2008 construction project demolished wilburton tunnel formerly covered portion of freeway between factoria , bellevue.

the historic wilburton trestle passes i-405 diamond interchange se 8th street connects freeway south bellevue , lake hills area. in quick succession short diamond interchange ne 4th street, full cloverleaf ne 8th street, serving downtown bellevue , overlake medical center, , hov left exit bellevue transit center , ne 6th street. sr 520 provides access medina , redmond, home of microsoft corporation next interchange, half cloverleaf interchange several fly-over ramps allow complete access , sr 520.

bridle trails state park borders freeway on east side, while watershed park , northwest university on western side of freeway approaches ne 70th place, serving houghton , snyders corner before approaching full cloverleaf former sr 908 serving kirkland. incomplete interchange ne 116th street comes before i-405 connects totem lake via interchange ne 124th street , hov left exit evergreen hospital , ne 128th street. ne 160th street next interchange before i-405 crosses on sammamish river , connects sr 522 provides access downtown bothell , woodinville. interchange ne 195th street provides access local business park , university of washington bothell branch.

i-405 in snohomish county

entering snohomish county @ mile post 25, i-405 enters wooded area before coming interchange bothell-everett highway (sr 527), final interchange before i-405 terminates @ interchange between interstate 5 , sr 525.

as of 2007, heavily traveled section of i-405 near se 8th street in downtown bellevue, daily average of 200,000 cars per day traveling through segment. number lower in 1997, 190,000 cars per day, has dramatically increased since first measurement in 1967, 32,600 cars per day traveling through bellevue.