Life Span Prediction of Traffic Signal Controllers
Publication: International Conference on Transportation and Development 2024
ABSTRACT
Traffic signal controllers are devices that regulate the timing and operation of signalized road intersections, promoting efficient flow and safety. Traffic signal controllers can fail for several reasons, but there is limited knowledge of signal controller failure mechanisms in previous research. Understanding the failure methods can help predict the lifespan of traffic signal controllers. This study was the first known attempt to analyze the full lifespan of a traffic signal controller using a fault tree model. The lifespan obtained from the literature ranged from 4 to 20 years, and fault tree analysis predicted an average lifespan of 12 years. In addition, a sensitivity analysis (±20%) was performed to address uncertainty with the inputs for fault tree analysis, which predicted a range between 9 and 15 years. Transportation agencies can use life span predictions to estimate funding needs and improve asset management practices.
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Published In
International Conference on Transportation and Development 2024
Pages: 774 - 784
History
Published online: Jun 13, 2024
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