PD REVISED BACKGROUND REPORT (PL-REZ-2022-015_AMEND REZ-05-027)

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Engineering SI udy Findings: This design plan and cost analysis is meant to provide short term improvements that can enhance the safety of the intersection with the use of available existing earmarked fiends. The most dran-iatic improvement at the intersection would be to increase sight distances by trimming the lower 40% of the rock embankments north and south on both sides of the roadway at 1/4 : 1 slope. I) Trim the S. E. embankment—180 feet, ideally 4-5 feet, but conservatively 3 feet due to the existing nearby residential structure on the bluff. Mike K-ochina's engineering observation and calculations indicated a 4-5 ft. cut is possible given the position of the structure on the S.E. bluff, and the angle of the trim cut of the bank. The present site distance is—200 feet, and could be increased to a minimum improvement of 500 feet with a 4-5 ft. cut. There would be only approximately 300-400 ft. sight distance available with a 3 ft. cut. This section represents the greatest site deficiency for egressing Kaloko Drive, and will yield the greatest sight/safety improvement with cutting the embanlanent. II) Trim the N.E. embankment—210 feet with a 4-5 foot cut. Existing site distance is —450 feet to the north,with anticipated improvement to—700 feet. III) Trim the N.W. embankment—180 feet with similar 4-5 foot cut; this would improve the sight distance from—400 feet to—600 feet. IV) Trim the S.W. embankment—160 feet, 4-5 feet wide, which would improve sight distance of—400 feet to over 600 feet. Modern methodology for cutting back the rock embanlanent would be standard Hoe Ram equipment to chip the rock into manageable pieces. In extreme cases in past years there would be drilling and use of explosives. However, this does not appear to be necessary with the type of lava rock present as observed by both Leo Fleming, C.E. and Mike Krochina, P.E. Turnout Lane: With the advent of cutting back the embankments on both sides of the road, which will widen the shoulders for better site visibility, there also presents the possibility for a center tarn lane. This would provide a huge safety improvement for left turns into and out of Kaloko Drive. It is recommended such a lane be extended northerly to encompass the Lihau Street intersection to a distance of—700 feet,and extend —370 feet southerly at which point guard rail restrictions occur.