United States Department of Transportation
i
Analysis, Modeling, and Simulation (AMS) Testbed Requirements for Dynamic Mobility Applications (DMA) and Active Transportation and Demand Management (ATDM) programs
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2013-11-01
[PDF-2.70 MB]
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Abstract:The document presents a combined set of requirements for an AMS Testbed based on the foundational research already conducted under the ATDM Program, and the analytical needs of the DMA bundles. A total of 103 requirements are identified to represent the following: System Entities (“nodes”) (System Users, Connected Vehicles/Devices, Communications Systems, Operational Data Environments, and System Managers); Data and Information Flows (“arcs”) connecting system entities, including attributes of latency, aggregation, message content, range, reliability, and accuracy (error); ATDM Strategies and DMA Applications enhancing current decision-making by System User or System Managers or enabling new forms of decision-making by Users and Managers; Operational Conditions (ambient demand, incident, and weather conditions); and, System Performance Measurement (mobility, safety, environmental, cost).
Each requirement is assigned a technical risk, an importance rating, and priority. Technical risk represents a subjective assessment of the difficulty in meeting this requirement within a near-term test bed compared to current modeling capabilities. This subjective assessment is calculated using inputs from expert stakeholder feedback (collected as a part of workshop held at the 2013 TRB Annual Meeting), members of the USDOT key content review team, and the authors of this document. Importance ratings were assembled in a similar manner to technical risk assessment, and represents a subjective measure of how critical this requirement will be in differentiating among expected alternatives. Priority ratings are non-subjective measures calculated combining the expert panel assessments of technical risk and importance by modeling scale (tactical and strategic). For this effort, USDOT seeks testbed development that maximizes the number of important requirements, while minimizing technical risk. The collection of functional requirements presented in this report represent a high-level set of capabilities required by an ATDM-DMA Testbed. However, these functional requirements are not detailed enough to allow an analyst to directly create one or more testbeds. Each of these high-level functional requirements will have to be broken down into more detailed requirements in any follow-on testbed design and test effort.
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