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2023-24 Northwest Regional Pavement Repairs and Breakaway Cable Terminal

The southbound I-5 off-ramp to Northeast 71st Street will close from 9 p.m. to 5 a.m. nightly Monday, April 29, through Friday morning, May 3, for guardrail, barrier and attenuator work. A signed detour will be available, with more details on our Travel Center Map.

The southbound SR 99 ramp to eastbound SR 104 in Edmonds will close from 10 p.m. Sunday, April 28, to 5 a.m. Monday, April 29, for pavement repairs. A signed detour will be available, with more details on our Travel Center Map.

Project overview

A regional project beginning in March 2024 will update 24 guardrails and attenuators along Interstates 5, 90 and 405, US 2 and State Routes 522 and 527 in King, Snohomish and Whatcom counties. The breakaway cable terminals, or guardrail protective end caps, face oncoming traffic and will be replaced with end caps designed to crumple and increase safety when hit. This project also will replace impact attenuators protecting concrete barriers at the James Street and Northeast 71st Street exits from southbound I-5 in Seattle, improving their ability to absorb energy in a crash and improving safety.

In September 2023, a second regional project improved and preserved a five-mile stretch of SR 18 near the Tiger Mountain State Forest. The project sealed cracks between Issaquah-Hobart Road Southeast and just south of Raging River. After pausing during the winter, the project will resume in April and make pavement repairs on 26 ramps at 12 interchanges along I-405 in Tukwila, Kirkland and Bothell, SR 509 in SeaTac, and SR 99/SR 599 in Tukwila and Edmonds.

Timeline
Spring 2024 - Summer 2024
Project status
Construction
Funding
$5.7 million (combined)

What to expect

Crack sealing on SR 18 has concluded, and the project will take a pause until next spring.

During next spring's ramp repairs, expect nighttime ramp, lane and shoulder closures, with signed detours available.

The Breakaway Cable Terminal Replacement project will require shoulder and some lane and ramp closures.

The guardrail protective end cap along the Swift Avenue South on-ramp to northbound I-5 in Seattle was replaced on Monday, March 11.