Recommended Practices for Signalized Intersection Applications
This document outlines how to use SAE J2735 and other related information for signalized intersection applications. The document focuses on how to use SPaT and MAP messages to support signalized-intersection applications. In general, implementation guidance is necessary to achieve interoperability by addressing the requirements for the options for both over the air dialogs and message contents, and to support larger intersection maps
This document also addresses using Signal Request & Signal Status messages corresponding to vehicle functionality and approaches to traffic signal priority/pre-emption (TSP), including three different methods for implementing TSP over the air. The project is complementary to the connected intersections project being performed by ITE.
Rationale: Because the SAE J2735 standard is data dictionary and not an implementation guide, this document will complement J2735 by explaining and demonstrating through working examples how these messages are constructed and used to meet operational needs of applications. The intended audience for this document is for the developers and practitioners to enable consistent implementation of connected signalized intersection applications to ensure national interoperability. This standard will also provide benefits to cooperative driving automation applications.