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CG Base Seattle Traffic Update


Google Maps directions to Base Seattle, courtesy LCDR Jonathan Stehn



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New ramp to the Base for those using I-5, courtesy RADM Bert Kinghorn:


1. Get off I-5 at the Edgar Martinez (4th Avenue S.) exit. 

2. Go west until you come to the very last stop light which is just before the viaduct.

3.  Against all your intuitive urges, turn RIGHT away from the CG Base which is right in front of you and onto a ramp that seems to lead to downtown Seattle. 

4.  The ramp will bend around toward Elliot Bay and finally dump you out on grade right in front of the Base. 

5.  Turn right into the base as normal when approaching from the North.


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Last Update: June 22, 2017

To view this information geographically, visit SDOT's Travelers Information Map

Click here to download the PDF of this information


June 23 - 25: Numerous street closures on Capitol Hill for Pride Weekend events.

June 23 - 26: Ramp and lane closures on northbound I-5 between SeaTac and Tukwila.

June 24 & 25: Northbound I-5 reduced to two lanes on the Ship Canal Bridge Saturday and Sunday morning.

June 24: Greenwood Car Show will close Greenwood Ave. N. between N. 90th St. and N. 67th St.

June 25: Annual Seattle Pride Parade on 4th Ave. in downtown Seattle.

June 30 - July 3: 4th Ave. S. closed between S. Washington St. and Jefferson St.

July 7 - 8: Full closure of northbound I-5 through downtown Seattle Friday night.

Note: Information subject to change. Additional construction or events may be planned in the Seattle area.
Questions? Contact:
construction.coordination@seattle.gov or call 206-684-ROAD

WEBMASTER'S NOTE:  We update this page weekly.  Please observe any barricades, be very careful in crosswalks, and watch for pedestrians and bicycles along Alaskan Way.  Click  HERE  for information about the area near Base Seattle (SODO).