Intelligent Transportation Systems (ITS) Standards Program

Welcome to the U.S. Department of Transportation’s Intelligent Transportation Systems Standards Program. The ITS Standards Program, standards development organizations, and public agencies have teamed to accelerate the development of open, non-proprietary communications interface standards. These standards define how ITS systems and components interconnect and exchange information to deliver ITS services within a multi-modal and interoperable transportation network.

Success Story: The National ITS Reference Architecture and ITS Standards. The National ITS Reference Architecture, also know as ARC-IT, provides a common framework for building an integrated, multimodal intelligent transportation system. ITS standards enhance the communication of systems identified in ARC-IT and help state and local decision-makers plan smarter and buy smarter, ultimately saving time and money.

Define, Procure, Deploy, Maintain, Update: Free Online Standards and National ITS Reference Architecture (ARC-IT) Training. Always Available on the Web! FREE training in ITS Standards and the National ITS Reference Architecture (ARC-IT)

International ITS Cooperation. Working Together: International Standards Harmonization. The USDOT’s International Standards Harmonization Program works with other nations, regions, and Standards Development Organizations (SDOs) to create common standards and policies that improve interoperability, reduce costs, and accelerate the development of Connected Vehicle technologies.

Free ITS Standards Training

ITS Standards Training logo This self-paced series aimed at practitioners in state and local highway agencies and transit agencies provides free online training on how to evaluate, procure, and implement standards-based ITS devices and equipment.
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Latest Modules

Latest Transit Modules

Spotlight

NEW! Connected Transportation Interoperability (CTI) Roadside Unit (RSU) Standard Update Published and can be downloaded at no cost here. Updates to CTI 4001 include clarifications, guidance and notes requested from vendors implementing the standard, updates to V2X communications transmission requirements related to LTE-V2X and new requirements related to the transmission interval tolerance for storing and repeating messages.

ARC-IT Version 9.1
In June 2022, the US DOT released ARC-IT Version 9.1, a significant update of the US National ITS Architecture Reference. The architecture toolset— RAD-IT and SET-IT—have also been upgraded to work with version 9.1 of ARC-IT.

New Standards from SAE

Connected Vehicle Standards

See a list of standards used in connected vehicle applications.

Deployment Tools

Test Procedure Generator (TPG)
TPG v3 automates the development of test procedures for NTCIP standards.

Center to Center (C2C) Reference Implementation (RI) Tool
C2C RI Tool verifies conformance to C2C standards.

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