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Transportation Updates
What you need to know to avoid traffic tie-ups on your way to and from Seattle Center.
Mercer Corridor Project
Welcome to our Transportation Update, where you'll find the latest on road work and other lane/road closures affecting access to Seattle Center. This page is updated weekly.
Please note that 1st Ave N Garage is now closed. Mercer Street Garage, between 2nd and 3rd Avenues North, and 5th Ave N Garage, between Republican and Harrison streets, remain open for public use. Arena construction will start soon. For more information on this transformational project, visit: New Arena at Seattle Center.    
To avoid traffic slowdowns, 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, and with the new Harrison St connection to South lake Union, Seattle Streetcar is also a walkable option. To learn more about traffic and road work in Seattle, visit: Seattle Traffic.
The SR-99 Tunnel is now open. Downtown entrances/exits at Seneca St and Western Ave no longer exist. Drivers enter the tunnel southbound from 6th Ave N (just north of Harrison St) and exit northbound SR-99 at Republican St. Harrison St is open across Aurora Ave N  connecting Seattle Center and South Lake Union. 
Through Friday, March 15, 9pm-5am nightly: Northbound Aurora Ave (surface street) will be closed between Denny Way and Harrison St. 
Through Friday, March 22, 24/7: 7th Ave will be partially closed between Blanchard and Lenora streets.
Through Tuesday, April 23, 6am-3pm weekdays: Blanchard St will be closed between 7th and 8th avenues.
Saturday, March 9 at 5am to Sunday, March 10 at 5pm: 7th Ave will be closed between Blanchard and Bell streets.
Monday, March 11 to Friday, March 15, 9pm to 5am nightly: Northbound Aurora Ave (surface street) will be closed between Denny Way and Harrison St.
Friday, March 15 at 10pm to Saturday, March 16 at 9am: 7th Ave will close between Blanchard and Bell streets.
Saturday, March 16, 12:30pm-3pm: The 48th Annual St. Patrick's Day Parade, traveling north on 4th Ave between James St and Westlake Park, will close 4th Ave and all associated intersections.   
Saturday, March 16, noon to 3pm: the 48th annual St. Patrick's Day Parade, whcih runs along 4th Ave N between James St and Westlake Park, will close that stretch of road, along with intersections along the parade route.
Sunday, March 17, 8am-12 pm: The St. Pat's Day Dash will use streets around Seattle Center, South Lake Union, Belltown and Downtown. Please check back for updates on associated road closures.
Beginning Saturday, March 23: Seven Metro bus routes will move from the downtown Transit Tunnel to surface streets, adding approximately 830 buses to Downtown streets on weekdays. Bus pathways will be created along 5th and 6th avenues, and some buses will move to 4th Ave. Check King County Metro for information on how the bus reroutes will change your commute. 
Waterfront Construction: Colman Dock is open, and the passenger-only ferry facility has been temporarily relocated to its north side. Pickup/ drop-off access remains in front of the terminal building. All drive-on customers arrive from S Jackson St. The west side trail is closed between  Lenora and Pike streets until Memorial Day. Road restoration work on Alaskan Way near Pike St has been completed. Four lanes of Alaskan Way, the Pike St crosswalk and the Pike Place Market Garage driveway are now open.


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