United States Department of Transportation
i
ITS logical architecture : volume I.
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2002-04-01
[PDF-4.62 MB]
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Alternative Title:EDL# 5391 - National ITS architecture documents : vol. 1 - description, U.S. Department of Transportation.;EDL# 5391 - National ITS architecture documents : logical architecture - vol. 1, description, U.S. Department of Transportation.;
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NTL Classification:NTL-INTELLIGENT TRANSPORTATION SYSTEMS-INTELLIGENT TRANSPORTATION SYSTEMS
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Abstract:The Logical Architecture is based on a Computer Aided Systems Engineering (CASE) model of the requirements for the flow of data and control through the various functions included in Intelligent Transportation Systems (ITS). Structured Data Flow Diagrams and Specifications, the components of the "Structured Analysis" approach used to define the Logical Architecture, are presented in this section to illustrate the decomposition of the Department of Transportation User Service Requirements (transportation industry requirements that define the National ITS Architecture, listed in Appendix C of this volume) as well as specific strategic requirements to processes and information flow. The Logical Architecture CASE model depicts transportation systems, such as, Traffic Management, Transit Management, and Emergency Management, as well as the "terminators" that bound these systems. The Logical Architecture includes the input (source) terminators and output (sink) terminators of ITS, but not the information imbedded in these terminators, and defines the information flow into, within, and out of the systems. It is the formal representation of the ITS operational concepts that are described in the Theory of Operations Document.
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