CEE 4600 Traffic Notes _ Handout

CEE 4600 Traffic Notes _ Handout - CEE 4600, Fall 2007...

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CEE 4600, Fall 2007 Basic Principles of Intersection Signalization Class Handout Page 1 Traffic Signal Control Terminology: Typical Signalized Intersection Elements Source: Mannering, Kilareski, and Washburn, Principles of Highway Engineering and Traffic Analysis, 3 rd edition Typical Signal Head Configurations (G = Green, T = Yellow, R = Red) Source: Mannering, Kilareski, and Washburn, Principles of Highway Engineering and Traffic Analysis, 3 rd edition
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CEE 4600, Fall 2007 Basic Principles of Intersection Signalization Class Handout Page 2 Indication : The illumination of one or more signal lenses (greens, yellows, reds) indicating an allowed or prohibited traffic movement. Interval : A period of time during which all signal indications (greens, yellows, reds) remain the same for all approaches. Cycle : One complete sequence (for all approached) of signal indications (greens, yellows, reds). Cycle Length (C) : The total time for the signal to complete one cycle. Green Time (G) : Time within a cycle for which a movement or combination of movements receives a green indication. Yellow Time (Y) : The amount of time within a cycle for which a movement or combination of movements receives a yellow indication, also know as the change interval. Red Time (R) : Time within a cycle for which a movement or combination of movements receives a red indication. This is expressed in seconds and given the symbol R. All-Red time (AR) : The time within a cycle in which all approaches have a red indication, also know as the clearance interval. Phase:
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CEE 4600 Traffic Notes _ Handout - CEE 4600, Fall 2007...

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