March 20, 2014 at 1:47 PM
Sections of Highway 99, Interstate 5, I-405, and three major Seattle streets will be partly or fully closed for road work this weekend.
- Saturday from 4:30 a.m to 7 p.m., the Alaskan Way Viaduct on Highway 99 will close in both directions so crews can study cracks in the columns and girders. A routine March 1 inspection found new cracks were forming, and old cracks lengthening, around the Seneca Street ramp, the Washington State Department of Transportation reported. The widest crack is about 1/16th of an inch. Later this spring, cracks will be filled with epoxy.
- Mercer Street will be closed from Seattle Center to Dexter Avenue North from 11 p.m. Friday until 6 p.m. Saturday, while Highway 99 will be closed approaching Mercer, from 11 p.m. Friday until noon Saturday — so bridge girders can be installed on Aurora Avenue North spanning the new Mercer East corridor. On-ramps from Mercer Street to I-5 will close from 8 a.m. to 6 p.m. Saturday and Sunday, to install electronic loops in the pavement that measure traffic volumes.
- The northbound collector-distributor roadway of Interstate 5 will be limited to one travel lane, because of expansion- joint repairs, where drivers merge and exit between I-90 and Madison Street. The work goes from Friday at 10 p.m. to Monday at 5 a.m. This will cause slowdowns leaving Sodo or approaching First Hill, and congestion could spill into the mainline of I-5. Click here to see an animated map.
- South Jackson Street in Pioneer Square will close from 7 a.m. to 7 p.m. Saturday, for paving related to the future First Hill Streetcar. Electrical installation for the streetcar will also close the corner of Broadway and Madison Street on Saturday and Sunday from 6 a.m. to 10 p.m.
- The right lane of southbound Interstate 405 will be closed from Highway 520 to Northeast Sixth Street, as well as the ramp from southbound I-405 to Northeast Eighth Street, from 11 p.m. Friday until 4 a.m. Monday. Crews will fix drains and barriers.