现场设备是智能交通系统（ITS）的关键部件。现场设备包括交通信号、信息标志、气象站、交通传感器、用于连接ITS（C-ITS）环境的路边设备等。 现场设备通常需要与其他外部实体（管理者）交换信息。现场设备可能非常复杂，需要对许多数据概念进行标准化以进行交换。因此，ISO20684系列分为几个单独的部分。 本文件规定了现场设备向一名或多名管理人员发送通知的需求、要求和设计。它依赖于ISO/TS 20684-3中定义的触发器定义。 注释1NTCIP 1103的某些部分与本文件有相似之处。 注2ISO 20684-1提供了关于ISO20684系列涉及整个ITS架构。

Field devices are a key component in intelligent transport systems (ITS). Field devices include traffic signals, message signs, weather stations, traffic sensors, roadside equipment for connected ITS (C-ITS) environments, etc. Field devices often need to exchange information with other external entities (managers). Field devices can be quite complex, necessitating the standardization of many data concepts for exchange. As such, the ISO？20684 series is divided several individual parts. This document specifies the needs, requirements and design for the field device to send notifications to one or more managers. It relies upon the definition of triggers as defined in ISO/TS 20684-3. NOTE 1？There are similarities between certain portions of NTCIP 1103 and this document. NOTE 2？ISO 20684-1 provides additional details about how the ISO？20684 series relates to the overall ITS architecture.