Applicant's Addendem to TIAR 12.12.2022

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KTL Kona Villas November 2021 Final TIAR Addendum m Page 20 International 12/12/2022 Innovate I Adapt I Sustain V. Summary and Recommendations Comments dated September 28, 2022 from the COH DPW Traffic Division were received and subsequent discussions with DPW resulted in an agreement to provide an addendum to the November 2021 Final TIAR to address the comments. Comment#1:Include the project connection to Lako Street, through Kekauanaoa Place, in Phase I as opposed to the original plans to include in Phase 2. The westbound left turns exiting the project from the Royal Vistas Roadway were redistributed to Lako Street via Kekaunaoa Place for all Future With Project conditions. Traffic analysis and recommendations based on this update are addressed below. Comment 2:Provide further documentation to support the need for State ofHawaii DOT to widen Route 11 from 2 lanes to 4 lanes, between Henry Street and Kamehameha III Road. Existing(2019)traffic analysis showed the Kuakini Highway and Lako Street intersections with existing movements that operate at LOS E or worse. Kuakini Highway passed the 4- hour traffic signal warrant in Existing(2019). Future analysis showed that the widening of Route 11 from 2 lanes to 4 lanes at Kuakini Highway would result in the best overall intersection operation while maintaining acceptable LOS for the Route 11 through movements. Comment#3: Include a discussion about the existing vehicular bottleneck along Route 11 at the intersection with Nani Kailua Drive. It was concluded that traffic signal phasing and the widening of Route 11 from 2 lanes to 4 lanes could improve intersection operations at Route 11 at Nani Kailua Drive. Regional traffic could also benefit from the extension of Nani Kailua Drive to Kuakini Highway, and the Oneo Lane extension from the proposed Nani Kailua Drive extension to Alii Road. Comment#4:Include clarification as to why "no action" (doing nothing) is better than installing a traffic signal or a roundabout at the unsignalized intersections of concern. The Hualalai Street (north) and Hualalai Street (south) intersections had poor side-street operations however they did not pass traffic signal warrants and an analysis as single-lane roundabouts was also poor. Due to the fact that the overall left turn volume at these intersections during the peak hours are relatively low it was determined that priority should be given to the Route 11 through traffic and the intersections remain as they exists. Comment#5: Mitigation for Lako Street The intersection of Route 11 and Lako Street will operate at LOS E beginning in 2029. Alternatives to the existing Lako Street traffic signal phasing resulted in acceptable LOS as permitted and protected+permitted. These should only be considered if adequate sight distance can be provided. With 4 lanes along Route 11, traffic operations at Lako Street were acceptable within existing signal phasing. With the widening, it is also recommended to consider a second Lako Street left turn lane.