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Mercer Corridor Project

If you need this information translated, please call (206) 733-9990.
Si necesita traducir esta información al español, llame al (206) 733-9990.

The Mercer Corridor stretches from Interstate 5 to 5th Avenue W, and has been one of the City of Seattle’s most significant transportation challenges for over 40 years. SDOT is committed to improving the Mercer Street Corridor by 2016.

Learn more about the Mercer Corridor Project or subscribe to email alerts.

Last updated  01/30/2015

Full closure of westbound Mercer St. and Dexter Ave. N, February 6-9

Beginning at 11 p.m. Friday, February 6 through 5 a.m. Monday, February 9th, westbound Mercer St. and Dexter Ave. N will be fully closed to traffic.  Capacity will also be restricted on eastbound Mercer St. Travelers can expect the following impacts:

  • Westbound Mercer St. will be fully closed to traffic between 9th Ave. N and 5th Ave. N. Travelers will be detoured onto Denny Way.
  • Dexter Ave. N will be fully closed between Roy and Mercer Streets. Travelers will be detoured onto 9th Ave. N.
  • Eastbound Mercer St. will also be restricted, but will have at least one lane open at all times.
  • Access to businesses and residences on Taylor Ave. N will be maintained from Roy St.
  • Advanced signage will be posted to direct pedestrians around the work zones.
  • Alternate routes during the closure may be found at: http://www.seattle.gov/transportation/mercer_maps_detour.htm

Eastbound Mercer St. lane restrictions February 9-13

Following the weekend closure, one lane of eastbound Mercer St. will remain closed 24/7 as crews complete concrete paving activities February 9 through February 13.

Please note that work is weather-dependent and may be cancelled and rescheduled for later dates if inclement weather occurs.

Please plan ahead and expect significant traffic delays. A weekend detour map with alternate routing during the closure can be found on the Mercer Corridor Project website's maps page.

Lane restrictions on eastbound Mercer St. begin January 28

Eastbound Mercer St. will be restricted to one lane between 5th Ave. N and 9th Ave. N from 9 a.m. to 3 p.m. for approximately two weeks. This closure will accommodate lighting work under the SR 99 bridge over Mercer St. Please plan ahead and expect traffic delays.

Pedestrian and bicycle route map

5th and Harrison streets pedestrian detour map

Upcoming changes

In 2015, crews will continue to work on Mercer St. between 5th Ave. N and 9th Ave. N, on Dexter Ave. N between Roy and Mercer streets and on Fifth Ave. N between Mercer and Broad streets. Here’s a preview of upcoming changes you can expect to see:

  • A full weekend closure of Mercer St. is tentatively scheduled for early February to remove the temporary roadway along the south side of Mercer St. between the SR 99 overpass and 8th Ave. N. Once this work is complete, the temporary curvature along Mercer St. will be removed. Look for more information in the coming weeks.
  • Daytime lane restrictions on 5th Ave. N and Mercer St. will continue as needed.

Intermittent lane closures on Mercer St. through spring 2015

Mercer St. between 1st Ave. N and 9th Ave. N will have intermittent lane closures during off-peak travel times between 9:00 a.m. and 3:00 p.m. to accommodate construction activities within the work zone. One westbound and up to two eastbound lanes will remain open on Mercer St. at all times.

Lane restrictions on 5th Ave. N between Mercer and Thomas streets through early 2015

The right lanes of northbound and southbound 5th Ave. N will have intermittent closures to accommodate electrical and sidewalk improvements through spring of 2015. Travelers can expect the following impacts:

  • The northbound and southbound right lanes on 5th Ave. N between Mercer and Thomas streets will be closed Monday through Friday from 7 a.m. to 3 p.m.
  • The northbound right turn lane on 5th Ave. N will be closed Monday through Friday from 7 a.m. to 3 p.m. Northbound traffic on 5th Ave. N will be able to turn right onto eastbound Mercer St. from the adjacent lane.
  • One lane in each direction on 5th Ave. N will remain open at all times.

Alternate routes through the corridor

With the closure of Broad St. and two-way traffic on Mercer St., Roy St., and Queen Anne Ave. N now in place, please consider using the following alternate routes during construction:

  • Use Roy St. as an alternate eastbound route through the Uptown neighborhood.
  • To access north Queen Anne, use Mercer St. and then proceed north on Queen Anne Ave. N.
  • Use eastbound Denny Way, 2nd Ave. or 5th Ave. to access I-5.
  • Use SR 99 and Elliott Ave. W as alternate routes to and from your final destination.
  • Access southbound SR 99 from Aloha or Valley streets.
  • To access northbound SR 99, use 2nd Ave. or 5th Ave. south from Denny Way and turn left on Battery St.

Route maps for navigating the corridor

Crews continue to monitor intersections throughout the corridor

We appreciate your patience as we work to improve flow throughout the corridor. Please continue to use alternate routes where possible and notify the project with any feedback, suggestions, or questions at mercerinfo@seattle.gov or (206) 419-5818.

Lane reductions on Mercer St. will continue throughout the West Phase of the Mercer Corridor Project, which is anticipated to be completed in mid-2015. Construction of this $95 million project will take approximately 2.5 years.


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