United States Department of Transportation
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Edition:Final; December 2018 – June 2021
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Abstract:Where analytical tools such as the Highway Capacity Software™ (HCS), SYNCHRO®, etc. do not adequately represent traffic operations within a study area, or do not provide the necessary performance metric(s) required for the analysis, detailed simulation or similar approaches may be required. In such cases, the Georgia Department of Transportation (GDOT) typically employs PTV VISSIM™ 11 as the preferred transportation modeling tool. This project has developed guidance material that enhances GDOT’s ability to review and utilize VISSIM™ models. To aid in the development of the necessary skills for VISSIM™ model review, a series of eight modules has been developed. The first four modules provide a basic introduction to arterial corridor and freeway model development, walking the reader step-by-step through the development of a small model containing unsignalized and signalized (fixed-time and actuated) control and a freeway segment and diamond interchange. The final four modules cover broader modeling issues, such as working with VISSIM™ results and direct output; underlying VISSIM™ model parameters and distributions; alternative model layouts and features; verification, calibration, and validation; and other issues critical to a thorough model review. These four modules culminate with reviewer checklists. After completion of all eight modules the GDOT reviewer will have been exposed to the knowledge and skills necessary to review and utilize a VISSIM™ model.
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