Frequently Asked Questions - Construction, Impacts & Mitigations
Controlled access is currently in place along sections of Dillingham Boulevard to facilitate utility relocation work. We are moving utility lines that are currently in the way of upcoming rail construction. Special duty officers, flaggers and a field ground team are onsite to provide the support required to keep the traffic flowing.
HART is obligated per its Federal Full Funding Grant Agreement (FFGA) with the FTA to complete the full 21-mile alignment. Residents especially living in West Oahu look forward to a full build-out of the rail system.
HART and our contractors are working to minimize construction noise in the following ways:
Daytime Work: Our primary noise mitigation strategy is to shift some of the louder construction activities to occur during daytime hours. HART continues to work with Nan, our utility contractor, to complete necessary studies, such as the completion of a Traffic Mitigation Plan, for approval by city and/or state departments to obtain approval for construction work. HART is required to provide the community with sufficient advanced notice of the upcoming work.
Reduce Source Noise: HART's utility contractor employs several management practices in order to reduce construction noise. These practices include the use of a white noise backup warning alarms, which creates a broadband sound that can be quieter and less annoying than typical beeping back-up alarms. Sound insulation blankets are also used around the loudest parts of the vacuum trucks. Whenever possible, smaller hand tools and plasma cutters are used, which generate less noise than traditional jackhammers and other equipment.
Noise Barriers: Our contractor may also consider using plywood barriers and composite acoustical panels to help reduce some of the construction noise. These barriers are intended to create an acoustic shadow that will help to reduce some of the noise from propagating away from the work areas. The manufacturer's laboratory tests showed that the noise barriers reduce sound levels at a receiver by breaking the direct lineof-sight between the source and receiver. While these tests differ from actual field installations, they do indicate that potential strategies are available to reduce some of the construction noise.
We give as much advance notice as we can, but delays do happen. We notify the community of delays and revised estimates of construction as well.