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Staff brief council on left‑turn phasing, signal‑clearance pilots and photo‑enforcement camera results
Summary
Traffic engineering described leading vs. lagging left‑turn signal phasing, dilemma‑zone detection pilots and conservative yellow/red clearance settings; police presented photo‑enforcement history, program types (11 fixed, 4 mobile), collision reductions at enforced locations and plans for further study.
Council hosted a work‑study presentation on traffic signals and the city's photo‑enforcement program. Traffic engineering recommended flexible, location‑specific left‑turn phasing and described pilot testing for dilemma‑zone detection and adaptive green‑time extensions, while police outlined the photo‑enforcement program's role in reducing collisions.
Traffic staff explained leading, lagging and protected permissive left‑turn phasing and said there is no single national standard that fits every intersection. Staff presented video examples showing intersections where leading or lagging phasing is…
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