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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 in February 2019. 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-week closure of the SR-99 Viaduct beginning on Jan. 11, 2019.
 
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:
 
Monday, Nov. 5 to Friday, Nov. 9, 10pm-5am each night: The Mainline Northbound I-5 will close between Edgar Martinez Way and Olive Way, with traffic directed into the collector/distributor. Several on/off-ramps will close include Seneca, University and Cherry streets and Olive Way.
 
Friday, Nov. 9 at 11pm to Monday, Nov. 12 at 5am: Crews will close all westbound lanes and ramps of SR 520 (Floating Bridge) between 92nd Ave NE and Montlake Blvd.
 
Saturday, Nov. 10, 5am-3pm: 1st Ave will close in both directions between Cherry St and Olive Way.
 
Saturday, Nov. 10, 9am to 5pm: Denny Way will be reduced to one lane in each direction between 7th and 8th avenues.   
 
Sunday, Nov. 11 at 5pm to Monday, Nov. 12 at 4am: 4th Ave will close between Stewart and Pine streets.
 
Monday, Nov. 12 to Thursday, Nov. 15, 8pm to 5am nightly: Crews will close 4 right lanes on northbound I-5 from Swift Ave S to the West Seattle Bridge.
 
Thursday, Nov. 15, 5:30pm: A Seattle Seahawks game at Century Link Field will add to the evening commute congestion.   
 
Friday, Nov. 16 at 9pm to Saturday, Nov. 17 at 5pm: 4th Ave will close between Pine and Pike streets. 
 
Saturday, Nov. 17 at 7am to Sunday, Nov. 18 at 5am: 2nd Ave will close between Cedar and Wall streets.
 
Friday, Nov. 30 at 11pm to Monday, Dec. 2 at 5am: Crews will close all eastbound lanes of SR-520 (Floating Bridge) between Montlake Blvd and 92nd Ave NE.
 
Saturday, Dec. 1, 9am to 5pm: Crews will close one lane of Denny Way in each direction at Dexter Ave N for road restoration.   
   
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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