The Highway 520 floating bridge will close this weekend. The closure, from Montlake Boulevard to I-405, goes from 11 p.m. Friday to 5 a.m. Monday.

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The Highway 520 floating bridge will close this weekend, while workers demolish the old Evergreen Point Road overpass on the east shore of Lake Washington. Cars there are now traveling on a new lid.

The closure, from Montlake Boulevard to I-405, goes from 11 p.m. Friday to 5 a.m. Monday. Alternate routes on I-5, I-90, and I-405 could become congested midday.

Transit routes 255, 271, 280, and 545 will use I-90. The I-90 express lanes will point toward Seattle from 6 a.m. to 2 p.m., then point east at 3 p.m., both afternoons.

Highway 520 at Evergreen Point is being widened to six lanes to prepare for a new, larger floating bridge mid-decade.