Developing long range traffic projection models for Illinois : final report.
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2004-06-01
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Edition:Final report, August 2003 through June 2004
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Abstract:The project objective was to develop a PC-based tool to assist Illinois Department of Transportation (IDOT) traffic forecasters ; to meet FHWA reporting requirements for 2,400 HPMS sections and 27,000 structures in the State of Illinois, and to produce ; construction forecasts for highway improvement projects. The research included a review of current IDOT traffic forecasting ; procedures, study of the IRIS database in which roadway information, including HPMS and structures forecasts, are stored, ; development of tables and search strategies to organize IRIS data efficiently for forecasting, and development and verification ; of a computer model to project historical traffic data to future dates for FHWA reporting. The resulting computer program, the ; Illinois Traffic Projection Tool (ITPT) uses regression techniques to project historical traffic data for evaluation and use by ; IDOT traffic forecasters. Area-wide and county-wide growth rates are computed by applying a weighting function to ; representative locations in each county. Forecasters can use these growth rates when extrapolation of historical trends is not ; indicated by the data. The ITPT will make routine reporting on HPMS sections and structures, and special reporting on ; highway improvement projects significantly faster and more easily documented for future retrieval.
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Main Document Checksum:urn:sha256:9c69634c58c4511eba3a954d6522ee2b1e84b30f3c05beb8150fae42e5c78204