Validating a Citywide Traffic Planning Modelby James G. Douglas, Parsons Brinckerhoff Quade &, Douglas, Inc, Orange, United States,
Abstract: A traffic planning model can improve the public agency's ability to forecast future traffic and plan appropriate roadway intrastructure. However, the usefulness of these models depends significantly on how well they are validated. This paper presents a discussion on validating a traffic planning model; the paper discusses modeling at a citywide scale, but most of the concepts and techniques are also applicable at smaller or larger scales. The validation process should not be viewed as only the testing and adjustment phase of model development. Successful validation actually starts with defining the intended model purpose and applications, and also includes structuring the model, assembling the data inputs, and making reasonable adjustments during the testing process.
Subject Headings: Traffic models | Validation | Model tests | Data processing | Forecasting | Highways and roads | Scale models | Structural models
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