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Office of the Assistant Secretary for Research and Technology
ITS Joint Program Office

ITS Standards

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ITS Standards have been developed for many of the architecture flows in the National ITS Architecture. Click on the standard(s) to view the architecture flows and their communication requirements. More...

Connected Transportation Interoperability (CTI) 4501 v01 – Connected Intersections (CI) Implementation Guide
This Connected Intersection (CI) Implementation Guide sets the requirements and provides guidance for nationally interoperable connected intersections across the United States that support interoperable applications for signalized intersections. This Guide defines the key capabilities and interfaces a connected signalized intersection must support to ensure interoperability with production vehicles for state and local IOOs. A connected intersection is defined as an infrastructure system that broadcasts SPaT, MAP, and position correction data to vehicles.

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Current Published Version: Version v01, Published in Sep 2021