The National Intelligent Transportation Systems (ITS) Architecture provides a common framework for planning, defining, and integrating ITS deployments. The Architecture has been developed and evolved stakeholder input utilizing a consensus-building methodology in accordance with legislative direction to develop and maintain a National Architecture. The National ITS Architecture reflects the contributions of a broad cross-section of the ITS community and provides a definitive reference for ITS deployment planning.
The National ITS Architecture defines:
- The functions that are required for ITS.
- The physical subsystems where these functions reside.
- The information exchanges that connect these functions and physical subsystems together into an integrated system.
Major new additions to version 7.0 include:
- An Architecture Use section was added to the website that describes how the architecture is used to support transportation planning, programming, and project development. This new view of the architecture includes planning factors, goals, objectives and strategies that are created through the transportation planning process. Each of these outputs are linked to the service packages in the National ITS Architecture, providing an entry point to the architecture that is oriented to transportation planners and grounded in the transportation planning process.
- The Architecture has been modified to keep it in alignment with the Federal Motor Carrier Administration’s (FMCSA) Commercial Vehicle Information Systems and Networks (CVISN) 4.0. Several architecture flows and support for FMCSA’s Wireless Roadside Inspection Program were added.
- Three new service packages were created to support Active Traffic Management: ATMS22: Variable Speed Limits, ATMS23: Dynamic Lane Management and Shoulder User, and ATMS24: Dynamic Roadway Warning.
- The website has been significantly upgraded, with hyperlinked diagrams, a 'use page' that supports transportation planning, programming and project development, and a new Institutional Layer page.
- The Architecture has been made more consistent with the ITS Architecture for Canada version 2.0. This includes the addition of APTS11: Multimodal Connection Protection and ATMS26: Mixed User Warning Systems.
- The Architecture has been aligned with the US DOT’s connected vehicle research program, including consistent use of connected vehicle terminology.
- Support for alternative pricing of roadways, including vehicle-miles-traveled (VMT) plans, was added with ATMS25: VMT Road User Payment.
The National ITS Architecture is available online at http://www.its.dot.gov/arch/index.htm.
The National ITS Architecture maintenance team maintains a LinkedIn group where feedback can be provided and ideas exchanged. This group is titled ‘National ITS Architecture’ and is open to all National ITS Architecture stakeholders. User support is available via the website.