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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 11/19/2014

Lane restriction on southbound Dexter Ave. N night of Wednesday, November 19

Southbound Dexter Ave. N will be restricted to one lane between Roy and Mercer streets between 10 p.m. Wednesday, November 19 and 6 a.m. Thursday, November 20. This closure will accommodate the removal of barriers within the roadway. Travelers can expect the following impacts:

  • One lane on southbound Dexter Ave. N will remain open at all times.
  • Bicyclists will be required to merge with vehicular traffic.
  • Please plan ahead and expect traffic delays.

Third eastbound lane on Mercer St. between 5th Ave. N and 9th Ave. N now open

On Sunday, November 16, crews opened a third eastbound lane on Mercer St. between 5th Ave. N and 9th Ave. N. This new Mercer St. configuration also includes 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. Please pay attention to street signs as travelers adjust to new traffic patterns.

Map showing new configuration

Intermittent daytime lane closures on westbound Mercer St. through 2014

Following the opening of the third lane on eastbound Mercer St., crews will begin improvements on the north sidewalk on Mercer St. This work will require intermittent single lane closures on westbound Mercer St. between 6th Ave. N and 5th Ave. N, weekdays from 9 a.m. to 3 p.m. through 2014.

Lane restrictions on 5th Ave. N between Mercer and Harrison streets through November

The right lanes of northbound and southbound 5th Ave. N will have intermittent closures to accommodate electrical and sidewalk improvements through the end of the year. During the closure, travelers can expect the following impacts:

  • The northbound and southbound right lanes on 5th Ave. N between Republican and Harrison 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 9 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.

Taylor Ave. N restricted to southbound travel only through 2014

Taylor Ave. N between Mercer and Roy streets will continue to be restricted to southbound travel only as crews complete work in the roadway. Travelers from westbound Mercer St. should use 5th Ave. N to continue north into the Queen Anne neighborhood.

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.

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.

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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