WSDOT (that’s pronounced whiz-dot, in case you’re curious) sez:

During the early morning this Sunday you may notice some extra activity on the Interstate 5 Ship Canal Bridge. Our maintenance crews will be out there replacing portions of the glare screen between the north and southbound lanes on the bridge from 4 a.m. to 10 a.m, Sunday Nov. 8. To keep drivers and workers safe crews will close the left lane of northbound I-5 on the top deck of the bridge during the work.