Drivers should expect congestion on Alki Avenue Southwest next Thursday and Friday, August 1-2. Seattle Department of Transportation paving crews will work from 9 a.m. to 5 p.m. 1200 block of Alki Avenue Southwest removing the old roadway surface and laying new asphalt. One lane of traffic will remain open for each direction of traffic. The Alki Trail, all crosswalks and sidewalks will remain open.