本文件描述了机器对机器（M2M）通信，以实现两个或多个参与实体或这些实体拥有或控制的通信设备之间的合作。该合作支持或支持对具有驾驶自动化功能的目标车辆执行动态驾驶任务（DDT）。其他参与者可能包括参与驾驶自动化功能的其他车辆、共享道路使用者（例如，手动操作车辆的驾驶员或行人或携带个人设备的自行车手）或道路操作员（例如，维护或操作交通信号或工作区的人）。合作驾驶自动化（CDA）旨在通过支持多辆车相互靠近的移动，提高交通安全和流量，和/或促进道路运营。例如，这是通过共享可用于（直接或间接）影响附近一个或多个道路使用者滴滴涕性能的信息来实现的。 参与协同自动化的车辆和基础设施要素可能共享信息，例如状态（例如，车辆位置、信号相位）、意图（例如，计划的车辆轨迹、信号配时）或寻求就计划达成一致（例如，协调合并）。交通领域的多个参与者和视角之间的合作可以提高安全性、机动性、态势感知和运营。然而，本文件中的任何内容均无意表明驾驶自动化需要此类合作才能安全执行。合作策略可以通过以满足给定应用程序需求的方式共享信息来实现。需求可以根据性能特征来表达，例如延迟、传输模式（例如，单向、双向）、范围、隐私和安全性，以及信息内容和质量。有几种潜在的技术可以在目标车辆和其他参与者之间传递信息。 本文件侧重于面向应用的功能，并不意味着需要或需要与通信协议或协议栈中的开放系统互连模型层相关的任何特定功能。本文件阐述了ADS操作车辆动态驾驶的作战和战术时间表，不包括行程安排、目的地和航路点选择等战略功能。本信息报告旨在促进沟通和了解合作驾驶自动化的设计、预期开发和验证。

This document describes machine-to-machine (M2M) communication to enable cooperation between two or more participating entities or communication devices possessed or controlled by those entities. The cooperation supports or enables performance of the dynamic driving task (DDT) for a subject vehicle with driving automation feature(s) engaged. Other participants may include other vehicles with driving automation feature(s) engaged, shared road users (e.g., drivers of manually operated vehicles or pedestrians or cyclists carrying personal devices), or road operators (e.g., those who maintain or operate traffic signals or workzones).Cooperative driving automation (CDA) aims to improve the safety and flow of traffic and/or facilitate road operations by supporting the movement of multiple vehicles in proximity to one another. This is accomplished, for example, by sharing information that can be used to influence (directly or indirectly) DDT performance by one or more nearby road users. Vehicles and infrastructure elements engaged in cooperative automation may share information, such as state (e.g., vehicle position, signal phase), intent (e.g., planned vehicle trajectory, signal timing), or seek agreement on a plan (e.g., coordinated merge). Cooperation among multiple participants and perspectives in traffic can improve safety, mobility, situational awareness, and operations. However, nothing in this document is intended to suggest that driving automation requires such cooperation in order to be performed safely.Cooperative strategies may be enabled by the sharing of information in a way that meets the needs of a given application. The needs may be expressed in terms of performance characteristics, such as latency, transmission mode (e.g., one-way, two-way), range, privacy and security, and information content and quality. There are several potential technologies for communicating information between the subject vehicle and other participants.This document focuses on application-oriented functionality and does not imply the need for or require any specific functionality associated with communications protocols or the open systems interconnection model layers in a protocol stack. This document addresses the operational and tactical timescales of dynamic driving on ADS-operated vehicles, and excludes strategic functions such as trip scheduling and selection of destinations and waypoints. This information report is intended to facilitate communication and awareness for the design and anticipated development and validation of cooperative driving automation.