CVRIA Glossary

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Terminator

An external physical object that represents the boundary of the connected vehicle environment. They provide the sources and sinks for external information that flows to and from the architecture. CVRIA does not define any of the internal functionality of terminator but it does define the information exchange between them and the physical objects whose functionality is internal to the workings of the connected vehicle environment.

Time

A measurable period during which an action, process or condition occurs.

Time synchronization

Calibration adjustment of date, hour, minutes and seconds for keeping the same time within a system.

Time-of-Day

Current hours, minutes and seconds within a day.

Traceability

The identification and documentation of derivation paths (upward) and allocation or flow down paths (downward) of work products in the work product hierarchy. Important kinds of traceability include: to or from external sources to or from system requirements; to or from system requirements to or from lowest level requirements; to or from requirements to or from design; to or from design to or from implementation; to or from implementation to test; and to or from requirements to test.

A cornerstone of the Connected Vehicle Reference Implementation Architecture (CVRIA) is the traceability between its components (as shown in the diagram below). Microsoft Access databases are used to maintain these connections. The hyperlinked CVRIA website relies on this traceability to build the links that allows navigation between the Applications' needs and requirements and the functional, physical, enterprise, and communications views.

Transition

A passage from one state, stage, subject, or place to another.

Traveler Physical Objects

Equipment used by travelers to access transportation services pre-trip and en-route. This includes equipment that are owned and operated by the traveler as well as equipment that are owned by transportation and information providers. The Traveler class is one of four general object classes defined in the Connected Vehicle Reference Implementation Architecture.

Trust Credentials

A user's authentication information which determines permissions and/or allowed actions with a system and other users.

Turbo Architecture

An automated software tool used to input and manage system inventory, service packages, information flows and interconnects of a regional ITS architecture and/or multiple project ITS architectures. This will be merged with the CVRIA tool called SET-IT in a future version to support the integration of connected vehicle applications with other ITS applications.