HONOLULU — A High-Friction Surface Treatment Installation Project will cause temporary closures of eight on- and off-ramps throughout Oahu starting Tuesday night, announced the Hawaii Department of Transportation.

This project is different from the city’s curb ramp project beginning the same day with work being done during the day.

According to HDOT, a surface friction coating will be applied to various ramps as a safety measure.

Overnight closures will begin Jan. 16 on the Windward side during the hours of 8 p.m. to 5 a.m.

Expect a full closure of the westbound H-3 Freeway on-ramp from Likelike Highway, Jan. 16 through Jan. 18, and a full closure of the Kailua/Mokapu Boulevard off-ramp (Exit 14) from the eastbound H-3 Freeway on Jan. 16.

Crews will work on one ramp at a time to avoid multiple closures on the same roadway.

Upcoming ramp improvements include the Mokapu Interchange, Kaneohe Interchange, Puuloa Interchange, and Ko Olina Interchange.

HDOT will keep the public informed of work at different locations on their Facebook and Twitter/X accounts, and on the HDOT roadwork page.

The estimated completion date of the project is the end of March, weather permitting.

Message boards will alert motorists to upcoming closures. HDOT reminds motorists to follow traffic control signs and onsite special duty police officers.