Strategic Deployment Plan - sacog

Systems by Architecture Entity
Each element in the regional architecture inventory is mapped to one or more entities from the
National ITS Architecture. In version 5.0 of the National ITS Architecture (on which this
architecture is based) there are 95 entities defined. These 22 subsystems and 73 terminators
describe a wide array of systems that provide ITS services, or interface with systems that provide
ITS services. The mapping of regional architecture elements to National ITS Architecture
entities has two primary benefits. First it allows the full set of information flows contained in the
National ITS Architecture to be used in the description of the regional ITS architecture
interfaces, and second, it allows the elements of the regional architecture to be grouped by like
entity.
Table 4.4 provides just such a sorting of inventory elements by entity. This table allows the
users of the architecture to immediately identify all the elements that have functions relating to
the subsystems defined in the National ITS Architecture Version 5.0 (e.g. transit management).
The Sacramento Regional ITS Architecture inventory contains the following number of elements
mapped to different types of entities:
• Archived Data Management: 13
• Emergency Management: 30
• Information Service Providers: 22
• Maintenance and Construction Management: 22
• Traffic Management: 18
• Transit Management: 16
097860000 SACOG ITS Strategic Deployment Plan
47 Final Report
September 2005