There will be a full closure of I-405 southbound this weekend.

All lanes of southbound I-405 from the Coal Creek Parkway SE off-ramp to the Sunset Boulevard NE /Southport Drive on-ramp will be fully closed nightly, Sept. 12 to Sept. 15, from 11:30 p.m. to 4 a.m.

Signed detours will be in place to divert traffic.

The closure is due to the I-405/Renton to Bellevue Widening and Express Toll Lanes project, which will add new capacity between SR 167 in Renton and Northeast Sixth Street in Bellevue. One new lane will be added in each direction and combine the existing HOV lane with the new lane to create a dual ETL system.

The new ETLs will connect to the existing express toll lane system between Bellevue and Lynnwood, as well as the SR 167 HOT lanes via the I-405/SR 167 Interchange Direct C

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