Highways

HONOLULU – The Hawaiʻi Department of Transportation (HDOT) notifies highway users of the continuation of current improvement projects on the H-1 Freeway, the H-201 Moanalua Freeway, as well as their typical work schedules.  

H-1 Pearl City and Waimalu Viaduct Improvements 

Crews have been working on deck demolition and concrete work on the H-1 Freeway in either direction between the Hālawa Interchange and the H-1/H-2 split on weeknights, Tuesday through Thursday from 7 p.m. to 4:30 a.m. The weekend work schedule is nightly, on Friday from 7 p.m. to Saturday 6 a.m., and Saturday 7 p.m. to Sunday 8 a.m. The estimated completion date of this project is March 2027.   

H-1 Salt Lake Rehabilitation 

Paving and guardrail work nears completion in the eastbound direction between the Pearl Harbor Interchange and the Salt Lake Boulevard underpass, continuously closed from 8 p.m. Friday to 2:30 a.m. Monday. Final striping work is scheduled to begin in the westbound direction beginning in September 2025. The common work schedule is nightly from Mondays through Thursdays, from 6:30 p.m. to 2:30 a.m. Eastbound striping work is anticipated to begin in late September. The new estimated completion date for this project is October 2025, from the previously stated June 2025.    

H-1 Freeway Airport Viaduct Improvements  

Concrete deck and roadway improvements continue on the westbound H-1 Freeway Airport Viaduct. In the vicinity of Valkenburg Street to the Middle Street merge, weeknight work will be underway from Monday through Thursday, from 8 p.m. to 4 a.m. the next day. The typical weekend schedule is a continuous three-lane closure from 8 p.m. on Fridays through 4 a.m. the following Mondays. This closure transitions into a full closure of the westbound H-1 Freeway Airport Viaduct from 11 p.m. to 6 a.m. the following day, on Fridays and Saturdays. The estimated completion date has been revised to December 2025 from the previously stated August 2025.   

Eastbound H-1 Freeway Improvement Project – from the Ola Lane Overpass to the Likelike Highway Off-Ramp 

Crews have been working to widen the eastbound H-1 Freeway and construct new retaining walls with daily work in the eastbound shoulder of the H-1 Freeway. Two lanes will be closed within the project limits on Monday nights through Friday nights, from 9 p.m. to 4:30 a.m., as work requires. The H-201 Moanalua Freeway on-ramp to the H-1 Freeway will also be closed during these hours. 

In addition to nightly closures, crews have been performing work daily on Richard Lane and Gulick Avenue respectively, with an alternating single lane closure, Monday through Friday, from 8:30 a.m. to 5 p.m. for utility relocation, in support of the widening of the freeway. Beckley Street is fully closed for daily waterline work from 7 a.m. to 3:30 p.m. on weekdays. Outside of work hours, Beckley Street remains closed at the intersection of Gulick Avenue, and is open to local traffic from the Diamond Head end of the street.  

HDOT estimates widening and retaining wall work to be completed by November 2025. Installation of a temporary pedestrian bridge for the widening of the Gulick Avenue overpass will require the H-1 Freeway to be completely closed in both directions overnight. This work is anticipated to begin in March 2026; this is changed from the previously estimated September 2025.     

The estimated completion date for the Eastbound H-1 Freeway Improvements Project is September 2027, weather permitting. This is revised from the previously stated March 2027 date. For more information, please view the project website at https://h1widening.com/ 

H-201 Moanalua Freeway Resurfacing – From the H-3 Freeway to Fort Shafter 

Night work continues with repaving in the westbound direction from the Kaua Street on-ramp up until the Hālawa/H-3 Freeway off-ramps. This work is scheduled for Sundays through Fridays from 9 p.m. to 4:30 a.m. Upon conclusion of this section, repaving work will move to the three left lanes in mid-October. The estimated completion date of this project is January 2026, weather permitting.  

HDOT reminds motorists to drive with caution, be aware of all traffic control signs and barriers and plan commutes ahead of time. Special duty police officers will be on-site assisting with safety procedures. Please note all work is weather permitting. The final completion date of this project is subject to change per these conditions.   

For a list of these projects and their typical schedules, please visit: https://hidot.hawaii.gov/highways/h-1-h-201-projects-quick-information/  

To view the weekly roadwork list for Oʻahu, please visit https://hidot.hawaii.gov/highways/roadwork/oahu/.   

To sign up for weekly HDOT lane closure updates please visit: https://public.govdelivery.com/accounts/hidot/subscriber/new 

 

 

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