United States Department of Transportation
i
Development of a Simulation/Assignment Model for the NJDOT I-80 ITS Priority Corridor
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2005-06-01
[PDF-2.93 MB]
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TRIS Online Accession Number:01010652
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OCLC Number:61463385
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Edition:Final report
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Abstract:The main objective of this research project was to implement a Dynamic Simulation/Assignment Model on NJDOT’s I80 ITS priority corridor from I287 to the George Washington Bridge (GWB). The Visual Interactive System for Transport Algorithms (VISTA) was implemented and several case studies were customized to demonstrate the potential of evaluating ITS technologies using Dynamic Traffic Assignment (DTA) and traffic simulation. The NJDOT-VISTA system was developed by first identifying the infrastructure data that included: the GIS data, the roadway geometry, and the location of ITS devices (detectors, VMS signs). Then the traffic control data were identified (signal timing, speed limit, lane designation). The third data category of data included the retrieval of traffic flow data that are needed for the estimation of the dynamic OD matrix, a static OD matrix (provided by the North Jersey Transportation Planning Authority) and 15-minute traffic counts (provided by the NJDOT). The VISTA system, own dynamic OD estimation algorithm was used. The calibrated NJDOT-VISTA system for the I80 corridor was then utilized to construct several case studies to demonstrate the potential use of the software for traffic management/operations, traveler information and transportation planning. Specifically the following case studies were developed: An incident management case study that included the evaluation of VMS sign location under incident conditions; A construction management case study that demonstrated the potential savings if information on the construction zone is provided to all travelers; A planning study on the evaluation of a set of potential combinations of VMS signs given a historical set of incident types for the network under consideration; A planning study on the evaluation of potential truck-related roadway improvements (special truck lanes, truck restriction). The case studies demonstrated the substantial usefulness of DTA modeling that produces the spatio-temporal trajectory of each vehicle from its Origin to its Destination. The main recommendations are: Develop a universal data model for NJDOT to supports transportation modeling; Develop a DTA-based model for the entire state; Develop an on-line DTA for I80 to support traffic operations, traveler information and short term and long term transportation planning.
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