Yellow Traffic Lights
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*Note: Please do not answer if you have already answered :)

*Question adapted from M. Kyte and T. Urbanik, Traffic Signal Systems Operations and Design: An Activity-Based Learning Approach (Book 1: Isolated Intersections). Plainfield, IL, USA: Pacific Crest, 2012.
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What is the purpose of using the yellow traffic light at a signalized intersection? *
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