Traffic Highlights

Traffic Highlights

Welcome to your headquarters for viaduct-related traffic information. Major traffic changes are highlighted on this page. To your right are links to a full list of closures, traffic cameras, and other resources to help you find your way. You can also sign up to receive weekly emails about upcoming detours and closures.


  • Driver alert: SR 99 closure near South Lake Union continues through Wednesday morning, Aug. 27

    Know before you go

    Find current traffic information on WSDOT's travel tools page or SDOT’s traveler's information page.

    Closure information

    From 5 a.m. Monday, Aug. 25 to 5 a.m. Wednesday, Aug. 27, SR 99 will be closed in both directions from the south end of the Battery Street Tunnel to Valley Street.

    Construction progress

    • Broad Street bridge demolition: Our time-lapse video captured work during a 48-hour period in which crews demolished the old roadway and added fill material to the now-closed section of Broad Street to bring it level with the rest of the highway. 

     

    • Utility work at Harrison Street: Sewer and electric utility work is also wrapping up near Harrison Street. Paving work is underway and the highway is scheduled to reopen by 5 a.m. Wednesday morning.

     

    Traffic update

     

    As we saw on Monday afternoon, backups on I-5 are starting early, particularly southbound heading into Seattle. Dexter Avenue North and Mercer Street in South Lake Union were very congested yesterday afternoon and that will likely be the case again today. Seattle Police officers will help direct traffic and keep key intersections clear.  

     

    We are encouraging drivers to continue to plan ahead for their commutes, especially with the Mariners playing at home tonight. Leave plenty of time to get to your destination, know before you go and use WSDOT's travel tools or visit SDOT’s travelers information page.

     

    Driver tips 

     

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  • Construction highlights for Friday, August 22 - Friday, August 29

    SR 99 corridor

    Friday, Aug. 22 – Wednesday, Aug. 27

    • Crews will close both directions of SR 99 between South Spokane Street and Valley Street from 10 p.m. Friday, Aug. 22 to 5 a.m. Monday, Aug. 25.
    • Both the South Royal Brougham Way on-ramp to northbound SR 99 and the Columbia Street on-ramp to southbound SR 99 will remain open until midnight Friday.
    • Both directions of SR 99 will remain closed between the south end of the Battery Street Tunnel and Valley Street from 5 a.m. Monday to 5 a.m. Wednesday.

    Monday, Aug. 25

    • Crews will close two lanes of northbound SR 99 from South Spokane Street to South Atlantic Street from 10 p.m. to 5 a.m.

    Monday, Aug. 25 to Tuesday, Aug. 26

    • Crews will close two lanes of southbound SR 99 from South Spokane Street to South Atlantic Street from 10 p.m. to 5 a.m. each night.

    Wednesday, Aug. 27

    • Crews will close two lanes of northbound SR 99 from South Spokane Street to South Atlantic Street from 10 p.m. to 5 a.m.

    Thursday, Aug. 28

    • Crews will close two lanes of southbound SR 99 between South Spokane Street and South Atlantic Street from 10 p.m. to 5 a.m. 
    • Crews will close the westbound West Seattle Bridge ramp to northbound SR 99 between 10 p.m. and 5 a.m.

    North

    Wednesday, Aug. 27​ – Friday, Aug. 29

    • Mercer Corridor Project crews will close the right lane of westbound Mercer Street between Fifth Avenue North and Dexter Avenue North from 9 a.m. to 2 p.m. each day.
    • Mercer Corridor Project crews will close the right turn lane from northbound Fifth Avenue to eastbound Mercer Street from 9 a.m. to 2 p.m. each day.

    Wednesday, Aug. 27

    • Building construction will close John Street between Taylor Avenue North and Fifth Avenue North from 6 a.m. to 6 p.m.

    Central

    Starting Wednesday, Aug. 27

    • Building construction will close the left travel and curb lanes on Fifth Avenue between Madison and Marion streets from 9 a.m. to 3 p.m. on weekdays. 
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  • Sharing the road during the four-day closure of SR 99

    When State Route 99 closes for four straight days starting Friday night, Aug. 22, you can expect more congestion and delays on surface streets getting into and out of downtown Seattle. We’re expecting more bikes on the road as travelers try alternate ways to reach their destination.

    To keep everyone moving safely, drivers and bicyclists will need to be especially mindful of each other as they use crowded streets and intersections. Obeying the law is essential. In Washington state, bicycles are legally considered vehicles on the road. For cyclists, this means following the same rules of the road as drivers. For drivers, this means using best practices and treating cyclists as equals who have the same rights to the road as you.

    Here are a few common sense tips to help all commuters get along:

    For drivers

    • Yield to oncoming bicyclists when making a left turn at an intersection.
    • Yield to bicyclists when turning across a bike lane.
    • Look for passing bicyclists before opening a door that faces traffic.

     

    For bicyclists

    • Ride in the middle of the lane in slower traffic.
    • Pass on the left, where drivers can see you.
    • Use hand signals and make eye contact with drivers.


    Finally, both drivers and bicyclists should keep an eye out for pedestrians and remember that pedestrians have the right of way at crosswalks.

    Additional resources:

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Current Conditions




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