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Architecture Development Process

The process undertaken for the development of the four Regional ITS Architectures for Massachusetts is illustrated in the following figure:

The first step of this process was the Needs Analysis, which identifies the ITS-related projects and needs of the operating and planning agencies in the region. This analysis served as the basis for the development of the functional requirements of the ITS Architecture and its component systems, developed in the following step. This approach ensured that the systems and technologies recommended for implementation, as well as the architecture that provides a framework for these systems, were consistent with the needs and goals of the region. Documentation from the region, including Regional Transportation Plans (RTPs) and Transportation Improvement Programs (TIPs), was reviewed as part of the needs analysis. Further information was obtained at a meeting of the Guidance Committee and through follow-up meetings with individual agencies.

The next step in the process was the development of the ITS Architecture, which defines the existing and planned component systems and the interfaces among them. As with the needs analysis, stakeholder involvement was critical to this step of the process. An initial draft of the architecture was developed from an inventory of ITS elements identified in the needs analysis and from stakeholder input at an architecture development workshop. Refinements to the architecture were made following stakeholder review, including a series of follow-up review meetings with various groups of stakeholders. Final refinements to the architecture were made once the architecture process was completed, allowing the architecture to reflect all of the comments received.

The next two steps resulted in documents derived directly from the ITS architecture. The first was the development of the Operational Concept, which addresses the institutional relationships that must be established in order to address the interagency interfaces defined in the architecture. The purpose of the Operational Concept is to define the roles and responsibilities of the stakeholders in the operation of the component systems of the architecture. The Operational Concept details requirements for each of the interagency interfaces in the architecture. These requirements address the information to be exchanged and the roles of the interfacing agencies. The Operational Concept also addresses the need for operational agreements among agencies that share interfaces.

The final piece of the architecture development process was the development of the Implementation Plan, which provides a strategy for achieving the integrated transportation system envisioned by the architecture. The Implementation Plan addresses the planned components of the architecture, identifying a series of initiatives that can be undertaken to implement these components. Also included in this step was the development of a plan for maintaining the architecture and ensuring consistency between the architecture and projects with ITS components.


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