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Scoping Report is Here!

Honoapiʻilani Highway Improvements Project's Scoping Report findings are now available to view.

Hawaiʻi Department of Transportation (HDOT) held meetings and accepted public comments during last year's Scoping Period, which were valuable in determining what we studied and how alternatives were developed. 

Learn More About the Report

Project Overview

The scenic coastal Honoapiʻilani Highway (State Route No. 30) is a single two-lane highway that currently serves as the primary access route to and from West Maui.

It is part of the island’s belt road system which operates as a two-lane principal arterial on the National Highway System (NHS) and Freight Network System (FNS).

The undivided highway provides two 12-foot travel lanes with 4-foot to 8-foot shoulders. Most of the highway terrain is relatively flat, lying close to mean sea level.

Learn More & View Documents

Project Goals

Image of damage road

Project Purpose

The Primary Purpose of this project is to provide a reliable transportation facility in West Maui and improve Honoapiʻilani Highway’s resilience by reducing the highway’s vulnerability to coastal hazards.


  • Provide Regional Transportation System Linkages that Support the Safe Movement of People and Goods
  • Conform with Regional Land Use and Transportation Plans
Picture of roadway with ocean and beach on the left

Project Need

As a coastal highway, Honoapiʻilani Highway is vulnerable to:

  • sea level rise
  • passive flooding
  • annual high wave flooding
  • coastal erosion

As delineated by the Hawaii Climate Change Mitigation and Adaptation Commission (HCCC)’s Sea Level Rise Exposure Area (SLR-XA).

Submit A Comment

Please use the form to submit a general question or to comment on the Environmental Process.

If you'd like to mail your comment, you're welcome to use this form.

Thank you for being a part of the process!

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To request language interpretation, an auxiliary aid, or special services (e.g. sign language interpreter, materials in alternate format), please contact Ms. Genevieve Sullivan:
Please submit requests one week in advance of the meeting or event.


  • January 2023
    • Launch of environmental assessment process, which includes NOI and EISPN. 
    • 2023 - 2024: Environmental Planning Process
  • 2023
    • Draft Environmental Impact Statement Published
    • Public Hearing (December 2023)
    • 45-day Public Comment Process
  • 2024
    • Final Environmental Impact Statement Published
    • Preconstruction
  • 2025
    • Construction Begins
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