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Engineers: modifying 12 West bulbouts would cost roughly $25,000–$30,000 per intersection; sight-distance problems largely tree-related
Summary
City engineers told the council that most sight-distance problems on 12 West can be fixed by trimming trees and that permanently shortening or relocating existing mountable bulbouts would cost about $25,000–$30,000 per intersection.
Nibley City engineers reported that most sight-line deficiencies on 12 West tied to the ongoing 12 West/12 phase improvements stem from vegetation and the position of existing curb bulbs rather than geometric design failures, and that moving or shortening the mountable curb bulbs would be a substantial retrofit.
Tom Dixon, city engineer, said that when measured to AASHTO sight-distance criteria the travel lanes and intersection sight distances comply when measured from the planned Phase 5 curb location, but trees and fences currently block drivers’ sight lines at some intersections. Dixon said trimming or removing…
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