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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 10/30/2014

Expanded work hours on 5th Ave. N between Republican and Harrison streets beginning Monday, November 3

The previously announced lane impacts on 5th Ave. N between Republican and Harrison streets will be modified beginning the morning of Monday, November 3, to include a 24-hour lane closure on northbound 5th Ave. N as crews conduct sidewalk and utility work. During the closure, travelers can expect the following impacts:

  • The far right lane of northbound 5th Ave. N between Harrison and Republican streets will be closed 24 hours a day.
  • A second northbound lane on 5th Ave. N will be closed weekdays from 7 a.m. to 3 p.m.
  • One northbound lane on 5th Ave. N will remain open at all times, and a second lane will be open after 3 p.m. each day.

Additional lane on eastbound Mercer St. coming in late November

Relief is coming as crews are hard at work to open a third eastbound lane on Mercer St. east of 5th Ave. N by late November of this year. This new Mercer St. configuration will also include two new left turn lanes from westbound Mercer St. onto southbound 5th Ave. N and is a major milestone as the project works to complete the West Phase of the project. In order to meet this milestone, crews will be fully closing a portion of Mercer St. and 5th Ave. N during one weekend in November. More details on this change, including detour routes and start dates, will be released in the coming weeks.

Lane restrictions on 5th Ave. N between Republican and Harrison streets beginning Monday, October 27

Beginning Monday, October 27 and continuing for several weeks, 5th Ave. N will be restricted between Republican and Harrison streets weekdays from 9 a.m. to 2 p.m. for sidewalk construction and utility work. During the closure, travelers can expect the following impacts:

  • 5th Ave. N will be reduced to one lane in each direction between Republican and Harrison streets.
  • One lane in each direction on 5th Ave. N will remain open at all times.

Reminder: Pedestrian changes throughout the corridor

Crews are continuing to complete sidewalk construction on Mercer St. and 5th Ave N. Please pay attention when walking through the corridor and follow pedestrian detour signage. New changes to pedestrian routes include:

  • The north and east crosswalks at the intersection of 5th Ave. N and Mercer St. are now closed. Pedestrians should cross Mercer St. at Taylor Ave. N or the west side of 5th Ave. N. Access to QFC and local businesses will be maintained via Taylor Ave. N and Roy St.
  • The sidewalk at the southeast corner of 5th Ave. N and Mercer St. is now open to pedestrians.
  • The north, east, and south crosswalks at the intersection of 5th Ave. N and Harrison St. are now closed to pedestrians. The crosswalk on the west side of the intersection remains open.

Daytime lane restrictions on 5th Ave. N between Republican and Mercer streets through October

The right lanes of northbound and southbound 5th Ave. N will be closed to accommodate electrical and sidewalk improvements at the southeast corner of 5th Ave. N and Mercer St. through October. Travelers can expect the following impacts:

  • One northbound and one southbound lane on 5th Ave. N between Republican and Mercer streets will be closed Monday through Friday from 9:00 a.m. to 3:00 p.m. daily.
  • Northbound traffic on 5th Ave. N will be able to turn right onto eastbound Mercer St. from the adjacent lane.

Pedestrian changes on Mercer St. at 5th Ave. N

The sidewalk at the southeast corner of Mercer St. and 5th Ave. N will be closed to pedestrians through October while crews complete sidewalk restoration. Pedestrians can expect the following changes:

  • Crosswalks on the north and west sides of the intersection will be open.
  • Crosswalks on the south and east sides of the intersection will be closed.
  • A new crosswalk is open on Mercer St. at Taylor Ave. N to facilitate east-west travel on Mercer St. between 5th Ave. N and Dexter Ave. N.

Pedestrian and bicycle route map

Intermittent lane closures on Roy Street through 2014

Roy Street between Fifth Avenue N and Queen Anne Avenue N will continue to have intermittent lane closures during off-peak travel times between 9:00 a.m. and 2:00 p.m. to accommodate construction activities within the work zone. Please pay attention to flaggers stationed in the roadway.

Intermittent lane closures on Mercer St. through 2014

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 lane on westbound and eastbound Mercer St. 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.

In its final configuration, Mercer St. will maintain three lanes in each direction between 5th Ave. N and I-5. All lanes will be operational by the summer of 2015. Until that time, Mercer St. will operate in a temporary configuration with two lanes in each direction.

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 atmercerinfo@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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