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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 Ave. 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  04/23/2015

New configuration at Dexter Ave. N and Mercer St.
Beginning Monday, April 20, northbound Dexter Ave. N will be in a temporary configuration for approximately six weeks as crews continue sidewalk, pavement, and signal work on the east side of Dexter Ave. N. Travelers can expect the following: 

  • There is one northbound lane on Dexter Ave. N for thru and right turning traffic approaching Mercer St.
  • Southbound Dexter Ave. N open to two lanes of traffic north of Mercer St. Southbound left turns from Dexter Ave. N onto Mercer St. are allowed, but all other left turns remain restricted at this intersection.
  • Drivers are prohibited from turning right from southbound Dexter Ave. N onto westbound Mercer St. Use 9th Ave. N as an alternate route to access westbound Mercer St.
  • Pedestrians should use the east side of Dexter Ave. N and the north side of Mercer St. between 5th Ave. N and 9th Ave. N.

Detailed maps of this intersection can be found on the project maps page.

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.

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 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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