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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
There’s light at the end of the SR-99 Tunnel. It will open by Thanksgiving this year. With it comes the reknitting of Harrison St. across Aurora Avenue, creating a new connection between Seattle Center and South Lake Union. The opening of John and Thomas streets will need to wait for a couple years. Please note that the tunnel opening requires a three to four-week closure of the SR-99 Viaduct, which we expect will happen in October or November.
 
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. Here is what to expect in the upcoming weeks:
 
Friday, Oct. 19 at 9pm to Monday, Oct. 22 at 5am: Southbound SR-99 will fully close between the West Seattle Bridge and the Battery Street Tunnel.
 
Saturday, Oct. 20, 6am-5pm:  Northbound SR-99 will close between S. Spokane St. and the north end of the Battery Street Tunnel.
 
Beginning on Friday, Jan. 11, 2019: The SR-99 Viaduct will close for approximately three weeks to prepare for the opening of the SR-99 Tunnel. Drivers should plan ahead for this period of heightened traffic congestion and allow additional driving time to reach their destinations, especially when driving near morning and evening commute times. Also consider other transportation options, such as Link Light Rail, using Seattle Center Monorail as a convenient connection between the Westlake station and Seattle Center.
 
Late Jan./Early Feb. 2019: The SR-99 Viaduct will close permanently, and the SR-99 Tunnel will open. Downtown entrances/exits at Seneca Street and Western Avenues will no longer exist. Harrison St. will open across Aurora Ave. N. for an improved connection between Seattle Center and South Lake Union. Please check back here for updates and information on how these road changes affect access to Seattle Center.        
 
Waterfront Construction: Traffic on Alaskan Way S./Alaskan St. is shifted to beneath the Viaduct between S. King St. and Pike St. Traffic is shifted to the east side of Alaskan Way between Pike and Virginia streets.Vehicle, pedestrian and bike ferry access is affected, so heed to the directional signage. Seawall construction stretches from Pike to Virginia Street. Daytime and evening construction will occur. Sidewalk access will be restricted along the west side of Alaskan Way. Access to Seattle Aquarium, Waterfront Park and businesses will remain open.


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