Lane closures are scheduled for the westbound H-1 freeway between the Pearl City/Waimalu offramp (Exit 10) and the H-1/H-2 split over four consecutive weekends, for micropile installations, according to the state Department of Transportation.

The weekend lane closures are scheduled as follows:

>> From 9 p.m. April 20 through noon April 21: Three right lanes will be closed for concrete pours.

>> From noon April 21 through 6 p.m. April 21: Two right lanes will be closed as the concrete cures.

>> From 6 p.m. April 21 through 11:59 p.m. April 22: Three right lanes will be closed for pavement restoration and clean-up.

>> To be repeated on the weekends starting Friday, April 27; and Friday, May 4.

The micropiles are being installed to support the drain boxes and covers in the right travel lane, giving them the additional needed support to sustain the weight of vehicle loads. Their installation requires the use of large equipment, including cranes, drill rigs and concrete mixers.

Special-duty police officers will be on-site to assist with traffic control, and electronic message boards will be posted to warn motorists of the closures. Motorists are advised to allow for extra travel time during the construction.

Updates on weekend lane closures and all roadwork are available at this link.