HDOT Climate Resilience Action Plan | May 2021

traffic patterns and related factors to present a traffic priority index to address coastal erosion. The third part of the report documented the exposure of roads to ocean hazards, including sea level rise, tsunamis, and storm surge. » Statewide Federal-Aid Highways 2035 Transportation Plan. 2014. Prepared for HDOT Highways Division by CH2MHill. https://hidot.hawaii.gov/highways/files/2014/09/Statewide-Federal-Aid-Highways-2035- Transportation-Plan_Yong.pdf This comprehensive long-range planning document identifies HDOT goals for land transportation systems statewide. Two of the statewide needs identified in the Implementation section of this long-term policy document include “preserve and maintain highway operations” and “provide emergency access and improve resiliency.” The range of potential solutions presented to address these needs ranges from critical day-to-day maintenance functions, such as “perform regular maintenance on roads and bridges” and “improve drainage facilities” to more complex solutions including “constructing alternate routes and bypass roads” and “relocate roads away from shoreline,” which will require a multi-stakeholder approach for success. » Transportation Asset Management Plan (TAMP) . June 30, 2019. Prepared by HDOT. https://hidot.hawaii.gov/highways/files/2019/06/HDOT_TAMP_Final_June2019.pdf This risk-based TAMP fulfills the requirements described in the Federal section of this appendix. It not only inventories HDOT assets, but it also provides a discussion of Hawaii’s unique challenges and vulnerabilities relating to climate change and other natural factors that affect system operation and maintenance, emphasizes the need for life-cycle planning, and presents a financial plan and investment strategies. The report contains a summary list of HDOT facilities repeatedly requiring repair and reconstruction due to emergency events. » Rockfall Protection Study at Various Locations, Statewide. 2014. Prepared for HDOT by AECOM. This study investigated and evaluated the then existing conditions of potential rockfall hazard locations along 96 highways and roadways under the jurisdiction of the HDOT Highways Division, and developed a systematic rockfall hazardmanagement database. Potential rockfall sites statewide were grouped into three classes: A, B, and C in accordance with the Federal Highway Administration’s (FHWA) Rockfall Hazard Rating System. “A” means the potential of rock falling and reaching the roadway was moderate to high; a “B” means the potential of rock falling and reaching the roadway was low to moderate; and a “C” means the potential of a rock falling and reaching the roadway was nonexistent to low. » Practical Solutions Action Plan . 2017. With Smart Growth America. According to this report, “practical solutions” is an outcome-focused approach to decision making for transportation project development and delivery. The goal is to precisely identify a transportation problem and then finely tune the scope of the solution to address it. This report is a guide for HDOT on how to identify and implement practical solutions and provides references for best practice examples of such solutions. B.3 LOCAL GUIDANCE B.3.1 CITY AND COUNTY OF HONOLULU’S MAYOR’S DIRECTIVE In 2018, the Mayor of the City and County of Honolulu issued Directive No. 18-02 requiring county projects and programs to “help protect and prepare the infrastructure, assets, and citizens of the City for the physical and

HAWAI‘ I HIGHWAYS | CLIMATE ADAPTATION ACTION PLAN ( B-3 )