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2005 Version 2.0 Architecture Changes

Stakeholders | System Inventory | Market Packages | Flows | Operating Concept | Funtional Requirements | Previous Updates

The following describe the minor changes to the VDOT NoVA ITS Architecture based on validation meetings with stakeholders, and other VDOT NoVA tasks since April 2005.

Stakeholder Updates

Deletions

The following stakeholders names were deleted either because their roles have been covered by other stakeholder descriptions or to ensure consistency with MWCOG's architecture.

The following stakeholders have been deleted to simplify the representation of VDOT agencies - their functions are under VDOT Central Office as the stakeholder.

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Renamed

The following stakeholder names were renamed to better express their roles or to ensure consistency with MWCOG's architecture.

Additions

The following stakeholder names were added to address new developments or to ensure consistency with MWCOG's architecture.

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System Inventory Updates

Entity Mapping Changes

The following list indciates changes to mapping national ITS architecture entities to inventory elements. The changes are either to correct previous discrepancies or to ensure consistency with MWCOG's regional architecture.

Deletions


Renamed

The following lists the inventory elements which were renamed to ensure consistency with MWCOG's regional architecture.

Additions

Stakeholder Association Changes

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Market Packages Updates

New Market Packages:

Added Probe Surveillance (ATMS 02) as a new market package with the following elements. The market package represents a desire of the NoVA STC to obtain travel time data from toll readers and toll administration agencies in the region.

Added Multimodal Coordination (APTS 7) to address transit signal priority with the following elements.

Updates to Existing Market Packages:

Information Flows Updates

Turbo software was used to build the information flows and the interfaces. Various new flows and interconnections were identified.

All the information flow diagrams were recreated and the operational concept for each of them revised and updated. Several new diagrams were also added to the website including information flow diagrams featuring interfaces from/to CapCOM, WMATA and VDOT VOIS (all new elements in the architecture).

A new internal frame was added to each element page to enhance readability of flow information.

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Operating Concept Updates

VDOT has identified a separate task (Task D-3) for a NoVA-specific Concept of Operations (COO) Development.

In addition to roles and responsibility statements in the Turbo Database, VDOT NoVA architecture also defined operational concepts by information flow diagrams. Each information flow diagram has a concept of operations associated with it on the website. Another source for concept of operations is the customized market package descriptions on the website.

A separate tab was added to the main menu called "Op. Concept" which leads to a page with a list of all the available information flow diagrams.

Functional Requirements Updates

Functional requirements are high-level descriptions of what each part of the regional ITS system must do. They are normally expressed as “shall statements”.

To ensure readability, the “shall” statements are not provided on the website. They are available in the Turbo database where these statements can be viewed by element.

The website only lists the functional area and the functional area description for each element at the bottom of the element page.

Previous Updates

What's new in Version 1.2

 

Disclaimer: This site is designed for transportation and other public agencies in the Northern Virginia region,
not for the general public's use. The official VDOT web site is located at www.virginiadot.org