Seattle Center News
Mercer Corridor Project, SR 520 and Alaskan Way Viaduct Update
mercer corridor project
The west phase of the Mercer Corridor Project will reconstruct the SR-99 Bridge over Mercer St. to continue a widened, two-way road. Roy St. will also be converted to a two-way road. The project will provide 10-foot wide sidewalks for pedestrian and bicycle transit along Mercer St.
Late April, crews began making signal adjustments at the intersection of 5th Ave. N and Harrison St. and signalizing the intersections of Dexter Ave./Republican St. and Broad/Harrison streets.
Starting on Monday, May 20 through the duration of the Mercer West Project—Mercer St. is reduced to two eastbound lanes and the north side sidewalk will be closed between 5th Ave. N and Dexter Ave. N. Vehicles going eastbound along Mercer St., shift to the south two lanes starting after 3rd Ave. W. Access to Mercer Garage will be maintained and the parking garage will remain open during the construction.
The SR-99 northbound exit at Mercer St. and the southbound exit at Broad St. are closed permanently.
Eastbound Broad St. is re-open as an alternative to eastbound Mercer St. Vehicles going south along 5th Ave N. from Mercer St. will notice new left turn signals along Harrison St. at 5th and 6th Avenues.
Friday, June 7— Monday, June 10 —The Mercer St. ramps to and from I-5 will be closed from 11pm on Friday until 5am on Monday. The University St. on-ramp to northbount I-5 will also be closed.
Through July 2013—Broad St. will be closed between Westlake Ave N. and 9th Ave N.
Through Summer 2013—Terry Ave. N is open only for access to parking on the west side of Terry Ave. N, south of Valley St. via Mercer St. There is access to Lake Union Park via Valley St. off of Fairview Ave. N only. No through access to Terry Ave. N is allowed.
Westlake Ave. N is fully closed to through traffic between Mercer and Aloha streets. Valley St. is fully closed to through traffic between Fairview Ave. N and Westlake Ave. N. Travelers heading west towards Westlake Ave. N are advised to use westbound Mercer St. to reach their destinations
viaduct / SR-99 tunnel, SR-520 & I-5
Until SR-99 Tunnel opens to traffic—6th Ave N is closed between Thomas and Republican streets. Harrison St. is closed between Aurora Ave. N and Broad St. Republican St . is closed between Aurora Ave. N and 6th Ave N.
Friday, May 31, 11pm until Monday, June 3, 5am—Crews will close both directions of the SR-520 floating bridge and highway and all ramps between Montlake Boulevard, in Seattle, and I-405, in Bellevue.