HDOT Climate Resilience Action Plan | May 2021

CONTENTS

FIGURES Figure ES- 1 The Basic Framework for Achieving System Resilience Figure ES-2 Climate Exposure Summary by Stressor

A MESSAGE FROM ED SNIFFEN, DEPUTY DIRECTOR OF THE HIGHWAYS DIVISION

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EXECUTIVE SUMMARY

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Background

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Figure 1

Current Practice vs Future Resilience Practice Risk Mitigation Approach

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Exposure Assessment Findings

Figure 2 Figure 3

Next Steps

Climate Exposure Summaryby Stressor

Kamehameha Highway Repairs at Ka‘a‘awa, O‘ahu 2018 Landslides on Kūhiō Highway, North Shore Kaua‘i Selected Repairs Sites on HDOT- Highways Roads Associated with Emergencies Since 1997 Assessment Steps Toward Prioritized Action Conceptual Collaboration Framework for Implementation

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Vision

Purpose of this Action Plan

Figure 4

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INTRODUCTION

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Figure 5

Who Should Read this Action Plan?

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Action Plan Organization

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Figure 6

THE URGENCY: WHY WE MUST ACT AND CHANGE CURRENT PRACTICES

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10 10 10 12 14 15 15 18 18 19 19 19 20 11

Figure 7

The Need for a Resilient Highway System

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A Future Unlike the Past

Figure 8 Figure 9

Resilient Design Process

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A Proactive Perspective on Mitigating Risk

Examples of Past Events

Concerns to be Addressed Through Data Assembly/Development

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Hazards Examined in this Action Plan Moving Toward Prioritized Investments

Partnerships in Implementation

TABLES Table ES- 1 Mileage of HDOT Highways Exposed to Climate Hazards (to 3.2 feet SLR)

Response and Recovery

IMPLEMENTATION PLAN

Maintenance Programs Data-driven Decisions

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Design/Mitigation

Table 1

Exposure Assessments

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Planning/Programming HDOT Lead/Resources

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Training

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Partnerships

NEXT STEPS

Investing for Effective Design When Considering Climate Change A Data-driven Resilience Program

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REFERENCES

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APPENDICES

3 HAWAI I HIGHWAYS C L I MAT E ADAP TAT I ON ACT I ON P L AN