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Edition:August 2016–June 2022
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Abstract:This Pooled Fund project [Transportation Pooled Fund Study TPF-5(351)] was aimed at developing and demonstrating a new type of self-de-icing LED signal for highway intersections as a replacement for existing LED signal lights that remain too cold to prevent snow, sleet, and ice buildup on the lens and could cause accidents in snowy conditions. The self-de-icing LED signals adopt a novel system architecture of “Integrated Light and Heat Arrangement of Low Profile Light-Emitting Diode Fixture” (Patent No. US 10,215,441 B2) or “Heated Lens Lighting Arrangement” (Patent No. US 10,253,965 B2, US 9,851,086 B2) for integrative solid-state lighting and heating. The heat generated by the LEDs is harvested by the passive heat exchanger and stored there to continuously heat the signal lens in wintery conditions.
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