Drivers should prepare for delays east of Snoqualmie Pass due to daytime lane closures and full nighttime closures.

Crews working to improve nighttime visibility so drivers will experience single-lane closures westbound only during the day from 8 a.m. to 4:30 p.m. Thursday, Feb. 23 and Friday, Feb. 24.

Overnight, drivers will experience full closures of I-90 in both directions: · I-90 westbound, Stampede Pass interchange, 10 p.m. to 5 a.m. and I-90 eastbound, east of the summit, 11 p.m. to 6 a.m. Thursday night, Feb. 23 to Friday morning, Feb. 24. · I-90 westbound, Stampede Pass interchange, 10 p.m. to 5 a.m. and I-90 eastbound, east of the summit, 11 p.m. to 6 a.m. Friday night, Feb. 24 to Saturday morning, Feb. 25.

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Crews will reopen both directions of I-90 every two hours to clear out traffic. In an effort to improve visibility and safety at night on I-90, crews are installing additional reflectors along barriers and installing LED lane markers where possible.

Crews are also removing built-up snow in the lanes along Keechelus Lake and cleaning the road dirt off the side panels to improve reflectivity.

A reduced speed of 45-miles per hour at night will assist drivers navigating through the eastbound lanes east of the summit; the temporary speed reduction will be in effect until visibility along the lake improves.

Follow @SnoqualmiePass on Twitter and check Mountain Passes Web Page for updates.