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Many traffic simulation models have been developed over the years; however, most existing models are not well-suited for evaluating Intelligent Vehicle/Highway Systems (IVHS) concepts. This paper describes a new model, the Vehicular Traffic Analysis Capability (VTAC), specifically designed to model Advanced Traffic Management and Advanced Traveler Information systems. The model was developed using object-oriented analysis and design principles, and implemented in a relatively new, object-oriented, simulation language. VTAC is believed to be the first traffic model developed using the object-oriented paradigm. The principles used in the new model's design and the preliminary results obtained to-date are described. The model can currently model arterial networks, and sufficient progress has been made to demonstrate the utility of the object-oriented approach to traffic modeling.