Project updates
Learn about where and when construction is happening throughout the ST district.
Lynnwood Link Extension

Major changes to come to Northeast 185th and 5th Ave NE

Publish Date

Commuters can expect changes coming to NE 185th Street from 5th to 10th Ave NE. Sound Transit will install a roundabout at NE 185th and 10th Ave NE to minimize traffic congestion in this area as we begin construction at NE 185th and 5th Ave NE. The construction at NE 185th and 5th Ave NE requires a full closure of 5th Ave to construct the guideway and realign part of 5th Ave for the Lynnwood Link Extension project.

What

  • Roads will be closed to realign 5th Avenue Northeast. Detour information available below.
  • Flaggers will be on site to direct pedestrians, vehicles and bicyclists.
  • Commuters should expect delays and traffic impacts.
  • A temporary traffic signal will be installed on NE 185th between the east and west side of Interstate-5.

Work phases

  • Phase 1 – 185th & 10th Ave roundabout construction.
  • Phase 2 – 185th cut and cover tunnel to constructs south side of tunnel and 5th Ave roadway realignment construction.
    • Traffic condition: 185th one narrowed single lane with temporary signal alternating traffic; 5th Ave full closure between 183rd and 185th.
  • Phase 3 – 185th cut and cover tunnel to construct north side of tunnel.
    • Traffic condition: 185th one narrowed lane in each direction; 5th Ave opened in new alignment.
  • Phase 4 – 185th cut and cover tunnel finishes.
    • Traffic condition: 185th one narrowed lane in each direction with realignment so sidewalk construction on the south half of the bridge can be completed.
  • Phase 5 – 185th final alignment.
    • Traffic condition: 185th one lane in each direction and bike lanes in each direction.

When

  • This work will last approximately two years.
  • Phase 1 impacts will begin as early as March 2020, impacts will continue through summer of 2022.
  • Work hours are from 7:00 am to 10:00 pm Monday to Friday, however typical work hours are from 7:00 am to 6:00 pm.
  • Weekend and night work will occur as necessary.

Where

  • NE 185th Street (between 5th Ave NE and 8th Ave NE) and 5th Ave NE (between NE 183rd and NE 185th on 5th Ave).
  • See maps for traffic impacts and changes.

Suggested detour for this period

Map of the 185th and 5th Avenue NE area with detours

NE 185th Street and 10th Ave NE roundabout installation

What

  • Crews will install a roundabout to minimize traffic congestion.
  • Flaggers will be on site to direct pedestrians, vehicles and bicyclists.
  • The work area will have a closure to complete paving. 
  • When Lynnwood Link opens in 2024,  the roundabout at NE 185th and 10th Ave will be evaluated by the  City of Shoreline. To provide feedback regarding the future of the roundabout please contact City of Shoreline (contact listed below).

When

  • This work will take approximately four weeks.
  • Work hours are from 7:00 am to 7:00 pm (may include weekends).
  • Expect full closure for paving and striping operation with notification.

Where

  • NE 185th Street and 10th Ave NE.
  • See maps for traffic impacts and detours.

Suggested detour for this period

Map of the 185th and 10th Avenue NE area with detours

Shoreline North/Northeast 185th Station Re-Channelization

Shoreline North/Northeast 185th Station Re-Channelization will feature:

  • Roundabout at Northeast 185th and 10th Avenue.
  • Roundabout at Northeast 185th and 8th Avenue.
  • 4-way traffic signal at Northeast 185th and 5th Avenue.
  • Sidewalks and curb ramps.
Lynnwood Link Shoreline North/Northeast 185th Station re-channelization map