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Maintenance costs, while significant throughout the life-cycle of a project, may sometimes not receive full consideration as inputs to design decisions. In Phase I, this project identified research priorities in coordination with the technical advisory committee (TAC) after recommendations were formulated...

This study evaluated the approach-level safety performance of left-turn phases at signalized intersections, including permissive, protected-permissive (PPLT), protected indications, and flashing yellow arrow (FYA). Data collection included exact dates of traffic signal changes, high-resolution datasets...