Traffic Advisory: From 10 PM Friday, Sept. 20, to 6 AM Saturday, Sept. 21 Westbound Interstate 90 will be reduced to two open lanes from Mercer Island to Seattle.

• The two right lanes will close, and people using westbound I-90 Friday night should plan for delays and allow extra travel time. The first lane will close at 9 p.m., and the second lane by 10 p.m. The 76th Avenue Southeast and West Mercer Way on-ramps to westbound I-90 will also close at 9 p.m. Friday.

Beginning at 10 PM Friday, Sept. 20, and continuing until 5 AM Monday, Sept. 23. Southbound I-5 and I-5 Express Lanes off-ramps to Mercer Street will be closed. Travelers will need to exit north or south of Mercer Street during this time.