Starting Thursday, Sept. 10, the Tremont Street on-ramp to westbound SR 16 will close for construction. Single-lane closures on westbound SR 16 will also occur through Dec. 31, 2027.
Westbound I-90 will close from 10 p.m. Friday, Sept. 11 to 6 a.m. Saturday, Sept. 12. All lanes will close between mileposts 7 and 3. The I-90 on-ramps from 76th Avenue Southeast/North Mercer Way, Island Crest Way, and West Mercer Way will also close.
Southbound SR 515 will have right-lane closures daily from 9 a.m. to 3 p.m. through Sept. 18. Northbound I-405 will have off-ramp traffic alternating with flaggers from 9 p.m. to 5 a.m. through Sept. 18.