Applicant's Addendem to TIAR 12.12.2022

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KTL Kona Villas November 2021 Final TIAR Addendum m Page 16 International 12/12/2022 Innovate I Adapt I Sustain Table 7: Future (2039)With Project Traffic Operations at Route 11 and Kuakini Highway 2-Lane Route 11,Protected NB LT Signal AM PM Phasing on Kuakini Highway Delay v/c LOS Delay v/c LOS (sec/veh) (sec/veh) Route 11&Kuakini Hwy(overall) 47.0 - D 25.2 - C Route 11 NB Left 100.7 1.08 F 81.4 0.94 F Route 11 NB Through 2.1 0.65 A 2.1 0.66 A Route llSBThrough 61.6 1.03 F 31.2 0.95 C Kuakini Highway EB approach 0.0 0.00 A 0.0 0.00 A 2-Lane Route 11,Protected+Permitted NB AM PM LT Signal Phasing on Kuakini Highway Delay v/c LOS Delay (sec/veh) (sec/veh) v/c LOS Route 11&Kuakini Hwy(overall) 39.1 - D 6.8 - A Route 11 NB Left 86.8 1.04 F 26.0 0.86 C Route 11 NB Through 2.1 0.65 A 2.1 0.66 A Route llSBThrough 49.0 0.99 D 6.0 0.77 A Kuakini Highway EB approach 0.0 0.00 A 0.0 0.00 A AM PM 4-Lane Route 11,Unsignalized Delay Delay (sec/veh) v/c LOS (sec/veh) v/c LOS Route 11&Kuakini Hwy(overall) 16.5 - 2.9 - A Route 11 NB Left 73.1 1.04 F 23.3 0.65 C Kuakini Highway EB approach 0.0 0.00 A 0.0 0.00 A 3. Lako Street Intersection The overall Route 11 at Lako Street intersection is projected to operate at LOS E during the AM peak hour,beginning in 2029. As an alternative to the Existing(2019)split phasing on Lako Street, the Lako Street approach left turns were analyzed with the following traffic signal phasing options: (1)protected, (2)permitted, (3)protected+permitted, and (4) split phasing with Route 11 widened from 2 lanes to 4 lanes. A comparison of the phasing alternatives and the widening of Route 11 are shown in Tables 8-10 for 2024, 2029, and 2039. The protected phasing for Lako Street(Option 1) resulted in the intersection operations at LOS E in Future (2039) With Project during the AM peak hour and is not recommended. Permitted (Option 2) or protected+permitted (Option 3) phasing will operate at an overall acceptable LOS for all future years and can be considered for the Lako Street approaches if sight distance is adequate. If sight distance is inadequate, the split phasing should remain, and Route 11 should be widened from 2 lanes to 4 lanes (Option 4). In addition, the eastbound left turns from Lako Street onto Route 11 are nearing 300 vehicles per hour, which is the threshold for when a second left turn lane is beneficial. The widening of Route 11 from 2 lanes to 4 lanes will allow for 2 receiving lanes Route 11 to accommodate dual eastbound left turn lanes.