Document Number: Document Type: Former Doc. Number: Document Status: Published: 1602 Interface Definition none Working Group Draft Developed By: Center-to-Center Working Group Point of Contact: Manny Insignares, Consensus Systems Technologies Corporation Published: This document is not yet published. Description of Document: Defines a technology-independent model (GRM) for domain areas (initially including signals, detectors, DMS, and incidents) that enables easy translation between various technology-specific models, such as CORBA and DATEX.

Document Status:

Date submitted: 5/10/2005

In August 2002 -- With funding from the FHWA, a project team started development work on NTCIP 1602, "Generic Reference Model for Traffic Management." NTCIP 1602 will be one of two reference models for Center-to-Center communications. The GRM will be a protocol-independent model, suitable for use with both object-oriented implementations and for message-based implementations, such as DATEX-ASN. The CORBA-Specific Reference Model (CSRM) will be derived from the GRM, with CORBA-specific features added to enable interoperable CORBA implementations.

Scope of 1602 -- The 1602 GRM will be based on the work done for NTCIP 1601, but without the CORBA-specific details. The GRM will consist of a data model, message definitions, and sequence diagrams for each domain area. The data model will consist of a set of class diagrams in UML that depict the various relationships between the data concepts used in the standard.

The GRM will cover the same domain areas as the TMDD expedited message sets effort, as defined in the Joint ITE/AASHTO TRAFFIC MANAGEMENT CENTER STANDARD "TMDD EXTERNAL TRAFFIC MANAGEMENT CENTER COMMUNICATIONS (ETMCC), Volume I, TMDD Center-to-Center Concept of Operations and Requirements Standard." The 1602 Project Team and NTCIP Joint Committee agreed to reference the TMDD's Concept of Operations and Requirements, rather than repeating the ConOps in the NTCIP 1602 Generic Reference Model.

The domain areas that will be addressed first are:
>> Events (Incidents)
>> Signals
>> Detectors
>> DMS
>> Link/Node model

CORBA is the Common Object Request Broker Architecture, and UML is the Unified Modeling Language. Visit the Object Management Group at www.omg.org for more information.

A draft is not yet available for public download.

May 2005 -- The NTCIP Center to Center Working Group has decided to suspend work on this standard. AASHTO, NEMA and ITE are analyzing the dependency of the GRM on the TMDD components before any further FHWA funding is expended.

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