Construction alert: Lynnwood Link Extension

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Construction alert

Construction map for State Road 104 Full closure, Lynnwood Link Extension

Night work along the I-5 and State Route 104 Interchange

As early as Monday, October 18, Sound Transit’s contractor will begin a night operation along the I-5 and the SR 104 Interchange in Shoreline to complete concrete pours for the elevated guideway for the future Lynnwood Link Extension. This work will include a full closures of SR 104 as well as on-ramp closures. Detours will be provided (see map for the full closure detour). The contractor has obtained a Temporary Noise Variance to complete this work. This work is weather-dependent and may need to be rescheduled.


  • Overnight full closures of SR 104 Monday, October 18 through Thursday, October 21 from 10 PM – 7 AM each night (see map for detour route).
  • Overnight closures of the on-ramp from Eastbound SR 104 Monday, October 25 through Thursday, October 28 from 10 PM – 7 AM each night.


  • I-5 and SR 104 Interchange


  • There will be posted signs for the detours.
  • Plan ahead, leave early and allow extra time to reach your destination.
  • Please be prepared for delays while this work takes place.

Contact us

Community Engagement: or 206-398-5300
After-hours construction hotline: 888-298-2395

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24-hour construction hotline: 888-298-2395

More project info:
Get in touch: or 206-398-5300