Search Results

This document defines the requirements for connected-vehicle onboard units for vehicles ranging from bicycles to light duty vehicles, buses, emergency vehicles, and heavy commercial vehicles. It addresses multiple mandatory and optional interfaces, including V2X and other wireless interfaces. Additional interfaces that support security and in-vehicle communications are also addressed. The scope further includes multiple architecture options and corresponding application, hardware and security requirements. An Onboard Unit focused J2735 ASN.1 build is also distributed in concert with this document to ensure interoperable data exchange and data structures for information exchanged with other OBUs and Roadside Units. OBU developers and users will be able to directly apply this document to conformance certification programs, and security certificate authorities will be able to use it for the purpose of issuing certificates to trusted OBUs.

This technical report describes how to implement the Assured Green Period (AGP), which is a new feature initially identified in the CTI 4501 Connected Intersections Implementation Guide to support an in-vehicle Red Light Violation Warning (RLVW) application. The following topics are addressed in this report: 1. The purpose of the AGP and how it supports RLVW 2. How AGP supplements existing dilemma zone protection through advance detection at signalized intersections 3. Constraints for implementing an AGP using CTI 4501 4. Use cases for testing and validating an AGP

This document contains the requirements for transmitting position corrections information using the SAE J2735 and Radio Technical Commission for Maritime Services (RTCM) standards. The approach described in this document enables interoperability and consistent implementations in support of lane-level vehicle positioning for V2X infrastructure applications.

This information report is a cooperative perception services concept of operations. Included is a description of cooperative perception systems and a description of the data potentially shared between its participants. The participants are the actors within the cooperative perception system, such as vehicles, bicycles, pedestrians and infrastructure. The types of data that can be shared among the actors are presented, and the types of features and applications that can be satisfied based on the types and precision of information shared are classified into categories. This report supports a wide variety of potential cooperative perception use cases ranging from connected-vehicle enabled driver-assistance applications to connected automation.

This document provides the necessary testing & assessment methodology to verify the accuracy of MAP using RTCM correction messages to support red light violation warning by defining: 1. Connected intersection performance criteria to meet the needs of an in-vehicle application addressing intersection geometry accuracy 2. Test procedure and tools to assess MAP message accuracy relative to the physical geometry of the intersection This report also contains the following: 1. Analysis of the efficacy of broadcast intersection geometry 2. Analysis of position correction information enabling connected vehicles to establish correct vehicle lane determination

This document is an update of the Connected Transportation Interoperability (CTI) 4501 - Connected Intersections (CI) Implementation Guide v1.01. The existing document defines minimum requirements and provides guidance for nationally interoperable connected intersections that support interoperable applications for signalized intersections. The document will update and enhance guidance for: - required CI capabilities for infrastructure devices, including J2735 SPaT and MAP messages, and to provide signal timing assurance - providing positioning information by infrastructure devices - providing assurance of security for infrastructure devices - documenting systems integration considerations

This document provides the necessary testing & validation methodology to verify the accuracy and utility of SPaT to support red light violation warning by defining: 1. Connected intersections performance criteria to meet needs of the in-vehicle application addressing message accuracy, latency, stability and reliability of information flow. 2. Test procedures and tools to determine how accurate the broadcast SPaT message data are relative to the actual signal controller actions for phase start time and the duration. This report also contains the following: 1. Analysis of the accuracy of broadcast SPaT message relative to the actual signal controller actions for phase start time and the duration. 2. Analysis of the information processing latency of each link of the data flow across multiple devices for common connected intersection configurations. 3/ Analysis of the stability and reliability of the information flow to connected vehicles.

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.