Road construction associated with the Mercer West project is substantially complete, and North Portal construction related to the SR-99 viaduct and tunnel, is ongoing. The tunnel boring machine reached the north end of the SR-99 tunnel in April and is being disassembled. The tunnel is expected to open in early 2019.
Please consider all transportation options as you route your way to and from Seattle Center. Several Metro bus routes serve the Center, and Seattle Center Monorail
provides a speedy connection between Seattle Center and the Sound Transit/Metro Station at Westlake. If driving, please allow extra time in your travels during this critical period of transition on our roadways. If roads around the Mercer corridor are congested, consider other options to access I-5 and SR-99 using entry points south of Seattle Center, along 2nd Ave. and 5th Ave.
Until SR-99 Tunnel opens to traffic
: 6th Ave N is closed between Thomas and Republican streets. Republican St. is closed between Aurora Ave. N and 6th Ave N.
Southbound SR-99/Aurora exit and entry to Harrison St. is now open!
Friday, April 28 at 7pm- Monday, May 1 at 5am: Broad St. is closed between 1st and 3rd avenues. 1st, 2nd and 3rd avenues will remain open.
Monday, May 1, 11am-5pm
: Annual May Day March for Immigration & Immigrant Rights begins at Judkins Park and ends at Seattle Center. Expect rolling road closures beginning at 2:30pm along the march route: 20th Ave., to Jackson St., then north on 12th Ave. to Madison St., west to 6th Ave. to Denny, then north on 5th Ave. N. and west on Harrison St. onto the Seattle Center campus.
Tuesday, May 2 through July
: 3rd Ave. is reduced to one lane in each direction between Virginia and Blanchard streets.
Friday, May 5 at 11pm-Monday, May 8 at 5am: Eastbound is reduced to one lane; with traffic detoured to express lanes. In addition, the southbound and northbound Rainier Ave. S. on-ramps will be closed.
Friday, May 12 at 11pm-Monday, May 15 at 5am
: Westbound is reduced to one lane; with traffic detoured to express lanes. In addition, the I-90 off-ramps at Rainier Ave. S. will be closed.
Elliott Bay Seawall Project: Seawall project construction has moved north to between Virginia and Pine streets and adjacent to Pier 62/63. Work between Pine and Union streets wrap up in the early part of this year. Staging for this work stretches from Lenora St. to Pike St. Daytime and evening construction will occur. Sidewalk access will be restricted along the west side of Alaskan Way. As part of Waterfront Seattle, construction of the Pier 62/63 Rebuild Phase 1 is expected to begin soon.
For the SR-99 tunnel project, visit www.alaskanwayviaduct.org or call 1-888-298-5463.
King County Metro at kingcounty.gov/metro or 206-553-3000.
Sound Transit at www.soundtransit.org.
Community Transit at www.commtrans.org