This is the first of two articles outlining the development, structure, and capabilities of the US National Architecture (NA) for Intelligent Transportation System (ITS) deployment across the USA. The NA is a consensus architecture, developed by an iterative process of refinement, with regular open reviews by a wide range of stakeholders. It is a guiding framework, which will be used to develop US ITS standards. It specifies how to allocate logical or functional requirements to physical components, and defines 19 physical subsystems that cooperate with users, the environment, and other subsystems. These interoperations are characterised by the exchange of data or information messages. The NA has identified 53 Market Packages, which represent the provision of User Services with specific functional capabilities. Each package specifies the minimum deployment of systems and equipment packages, required for a particular capability. It is being used in several early ITS standards and activities, including the National Transportation Communications ITS Protocol (NTCIP). The choice of which telecommunications technologies to use becomes a local design decision, if the NA is carefully separated into transport subsystems and communication elements. The latter become commodities that can be considered apart from ITS subsystems.

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    UK and International Press

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  • Authors:
    • JAFFE, R S
  • Publication Date: 1996


  • English

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Filing Info

  • Accession Number: 00729735
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 26 1996 12:00AM