I-405

Route ID
405

UPDATE - Announcing ‘Conechella:’ Multiple highway closures across greater Puget Sound weekend of Aug. 22-25

UPDATE: The series of westbound SR 18 lane, ramp and directional closures has been postponed and will be rescheduled at a later date. The scheduled work on the SR 99 First Avenue Bridge has also been canceled. The information has been removed in the news release below.

Start planning now: Major highway closures, lane reductions around Puget Sound Oct. 11-14

Update: Oct. 10, 2024 - I-5 lane closures in Seattle will now include northbound lanes between mid-Boeing Field and the West Seattle Bridge. The updated information is reflected in the release below.

Update: Oct. 9, 2024 - The hours for the I-405 overnight lane reductions and ramp closures have changed. Note the lane closures will occur 8 p.m. Friday, Oct. 11 to 8 a.m. Saturday, Oct. 12. Ramps will be closed from 11 p.m. Friday to 8 a.m. Saturday. This updated information is reflected in the release below.

Plan ahead for Eastside travel: full closure of northbound and southbound I-405 in Renton for drainage work

Closure runs from late Friday, July 12, to early Monday, July 15 

RENTON – Summer is here and so is the summer construction season, including a full closure of northbound and southbound Interstate 405 in Renton starting at 11 p.m., Friday, July 12, to 4 a.m., Monday, July 15.

New ramps and I-405 interchange opening soon at Northeast 132nd Street in Kirkland

KIRKLAND – Relief is coming for drivers who regularly experience delays accessing Interstate 405 in Kirkland’s Totem Lake area.

Weather permitting, crews working for the Washington State Department of Transportation will open the new Northeast 132nd Street on-ramp to northbound I-405 and southbound I-405 off-ramp to Northeast 132nd Street on Monday, April 29.

Spring project will improve safety of guardrails and barriers in King, Snohomish and Whatcom counties

Evening work planned at different sites from March through June

SHORELINE – A project to update and improve the safety of 24 guardrails and barriers across King, Snohomish and Whatcom counties begins mid-March, adding energy-absorbing features to reduce the impacts of crashes.

Down the road: Contract awarded for I-405 corridor improvements including multimodal mobility, bus rapid transit

Construction begins later this year; project also includes express toll lane extension, direct access interchanges

BOTHELL – The Washington State Department of Transportation and Sound Transit awarded a design-build contract last week for a multiyear project along a segment of Interstate 405 that will extend the dual express toll lane (ETL) system and improve the flow of traffic on the Eastside.

WSDOT provides I-405/SR 167 project updates via virtual meeting with executive advisory group

Public invited to virtual May 24 meeting

BELLEVUE – The public is invited to attend a meeting with the I-405/SR 167 Corridor Program Executive Advisory Group Wednesday, May 24, to hear an update on the projects and work.

The Washington State Department of Transportation’s I-405/SR 167 Corridor Program includes more than 150 unique, coordinated multimodal projects, that enhance user experience and bring increased reliability to one of the state’s busiest corridors.

Slow down on ice and snow.

It's easier to skid or lose control traveling at higher speeds. Give yourself more time to stop.

Carry chains, practice installing them.

Winter conditions could mean chains are required on your route. Practice putting them on your vehicle ahead of time.

Pack your winter car kit.

Carry extra supplies like warm clothing, ice scraper and brush, jumper cables and other emergency items.