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Project Information

Noise Variance

  • Variance obtained from the Department of Health, State of Hawaii
  • To allow night and weekend construction
  • Reasons:
    • Minimize traffic disruptions
    • Shorten completion time
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Allowable Construction Hours

  • Work hours above the viaduct:
    • 24-hours (weekdays and weekends)
  • Work hours below the viaduct:
    • Not permitted during evenings or weekends
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Noise Mitigation

  • Weekend and night construction confined to the freeway and ramp areas
  • No night and weekend construction planned in Waimalu Gardens
  • Restricted construction at night
  • Use drilled piers instead of driven piles
  • Disable back-up alarms
  • Better steel plate installation
  • Quieter construction practices:
    • Locate equipment as far as possible
    • Equipment mufflers
    • Well-maintained equipment
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Traffic - What to Expect?

  • H-1 partial & full closures in both directions
  • Pearl City ramp partial closures
  • Moanalua Road partial closures at H-1
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Traffic Mitigation

  • All freeway lanes open during rush hours
  • A.M. zipper lane operational
  • Use widened portion
  • Coordinate traffic signal timing on Kamehameha Highway and Moanalua Road
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Other Construction Mitigation

The Department of Transportation is conducting innovative scheduling measures as an incentive to the contractor to complete the work quicker and keep freeway lanes open.

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Improving Traffic Flow on the H-1 Freeway

Oahu MapAs many commuters know, afternoon rush-hour traffic along the H-1 often stretches from Pearl City all the way back to Kalihi. To help relieve this bottleneck, the State Department of Transportation (DOT) in June will begin construction to add one new traffic lane and a wider shoulder on the Ewa-bound side of the H-1 Freeway from Kaonohi Street to the Pearl City off-ramp. When completed, this $55 million project will help alleviate traffic congestion by providing six lanes of freeway traffic all the way to the Pearl City off-ramp.

In addition to the widening, portions of the freeway in the Ewa-bound direction will be resurfaced and improvements will be made to the Pearl City off-ramp. Beneath the viaduct, several streets in the Waimalu Gardens neighborhood will also be repaved, along with utility improvements.

Because this is a large project that affects many people, DOT is offering incentives to the contractor, Kiewit Pacific Co., to finish ahead of schedule, while levying penalties for excessive lane closures. These measures will help ensure that the project will be finished on time with as little disruption as possible.
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Traffic Impacts

To help keep traffic disruption to a minimum, all freeway lanes will be open during morning and afternoon rush hours unless there is an unforeseen emergency, and the morning H-1 zipper lane will remain operational. In addition, the Department of Transportation will be working with the city to improve
traffic mobility along Kamehameha Highway and Moanalua Road during freeway lane closures.

While the freeway widening will provide significant benefits once it is completed, we realize that construction will cause some temporary impacts that motorists need to be aware of. Information on lane closures will be posted on electronic message signs and provided to radio stations from the city’s traffic control center.
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Highway Map

Construction Hours

Much of the construction along the freeway will be done at night to minimize the impact on commuters. But because many people live near the construction area, and nighttime noise must be kept to a minimum, work beneath the viaduct in the Waimalu Gardens neighborhood will be done only on weekdays from 7 a.m. to 6 p.m. No night or weekend work is planned in the Waimalu neighborhood.
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Getting More Information

DOT is committed to giving the public timely and accurate information about the project. Call the hotline, visit the Web site or attend monthly task force meetings to learn about the project’s status.

Hotline: 587-6316. This hotline will be staffed during construction hours. At other times, callers will be able to
get current information on lane closures and construction hours.

DOT Public Affairs Office: 587-2160.
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Info Hotline
(808) 587-6316

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