Traffic Signal Components - Subdividing the Problem into...

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Subdividing the Problem into Components or Subproblems Aids Abstraction and Modeling
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Example – Traffic Signal Design Example Traffic Signal Design Break the overall problem down into sub problems (components in this case) Develop goals for each sub problem Develop goals for each sub problem Identify level of analysis that is appropriate Identify or develop models to aid in design or analysis
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Traffic Signal Components Mast P l Display Signal head Pole Controller Lens & Light Source Sensor Foundation Power Source
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Sub Problems Sub Problems Display Signal Head Lenses and Light Sources Display, Signal Head, Lenses and Light Sources Mast and Pole d i Foundation Controller Sensor Power Source
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Display Head, Lens, Light Source Goals b l ( d f d l d ld l ) Visibility (size and intensity of displays, accommodate elderly) Color rendering (accommodate some types of color blindness) Information (number of indications) Reliability
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