ISO 13184-2:2016规定了DXM上的道路引导用例，以使用P-ITS-S向驾驶员或行人提供实时决策支持系统。道路引导协议（RGP）是数据交换消息（DXM）的一个实例，它代表了在其站点之间交换数据的通用消息。 RGP在P-ITS-S和R-ITS-S之间定义了一个可互操作的服务协议，用于交换数据元素。ISO 13184的本部分规定了以下内容: -实时决策支持系统的参考体系结构。 该参考体系结构为实时决策支持系统提供了一个通用的结构，并为P- ITS-S和R-ITS-S。该参考体系结构用于构建P-ITS-S和R-ITS-S之间的互连。 -P-ITS-S上各种用例的应用协议设计技术。 该技术采用了灵活、可扩展的协议设计。在许多情况下，ITS的应用程序协议旨在提供一组消息，这些消息取决于用例和消息交换方法。然而，列举某些应用程序的所有用例并不容易。用例可以经常更改或增强。对于这种类型的应用程序，协议设计（取决于用例）是不合适的。 ISO 13184的这一部分提供了一种基于用例设计道路导航应用协议的通用技术。 -原始数据元素。 基本数据元素通常用于以速度、位置和时间的形式配置安全警告和停车指南服务。 -道路和停车位的警告和停车指南用例。 ISO 13184的本部分描述了适用于P-ITS-S和R-ITS-S之间通信服务的用例，以提供安全警告和停车指导。 ISO 13184（所有零件）已按照ISO 21217、ISO/TS 17419和ISO/TS 17423中规定的要求对齐。 ISO 13184-2:2016仅规定了基于DXM定义（见附录B和附录C）的实时RGP消息。RGP信息的内容基于ISO 13184中记录的道路引导用例定义？1. ISO 13184的这一部分实现了ITS-SU对象，这是对其应用程序对象、其消息集和其他可能需要全局唯一标识和注册的对象的一般引用。 ITS-SU对象的管理是多方面的，例如ISO 24102？4，ISO 24102？5，ISO 24102？6，ISO 24102？7，ISO 24102？8和ISO 24102？9和CEN/ISO/TS 17423。 ISO 13184的这一部分实现了ITS-SU对象的授权和受控操作，这需要考虑ITS-SU对象标识符，即ITS-AID、其MsgSetID、ITS-SUID、ITS-SCUID、ITS-S通信协议栈中使用的地址和协议标识符等。 注:导航和定位系统作为道路导航应用程序输入的精度对于道路导航很重要，但不是ISO 13184系列的一部分。实施道路引导应用程序需要有关十字路口的详细信息。

ISO 13184-2:2016 specifies the road guidance use cases on the DXM to provide the real-time decision support system to drivers or pedestrians using P-ITS-S. The road guidance protocol (RGP) is an instantiation of the data exchange message (DXM), which represents a generic message to exchange data between ITS stations. The RGP defines an interoperable service protocol between P-ITS-S and R-ITS-S for exchanging data elements. This part of ISO 13184 specifies the following: - Reference architecture for real-time decision support system. This reference architecture provides a general structure for the real-time decision support system and the method of message exchange between the P-ITS-S and the R-ITS-S. This reference architecture is used to build the interconnections between the P-ITS-S and the R-ITS-S. - Technique of application protocol design for various use cases on a P-ITS-S. This technique adopts a flexible and extendable protocol design. In many cases, the application protocol for the ITS is designed to provide a set of messages that is dependent on the use cases and the message exchange method. However, it is not easy to enumerate all use cases for some applications. The use cases can be changed or enhanced frequently. For this type of application, the protocol design, depending on the use cases, is not appropriate. This part of ISO 13184 provides a general technique of designing the road guidance application protocol based on the use cases. - Primitive data element. The primitive data element will be commonly used to configure the safety warning and parking guide service in the form of speed, location and time. - Use cases at the road and parking spaces for warning and parking guide. This part of ISO 13184 describes the use cases applicable to the communication services between the P-ITS-S and the R-ITS-S for the purposes of providing safety warning and parking guidance. ISO 13184 (all parts) have been aligned according to the requirements specified in ISO 21217, ISO/TS 17419 and ISO/TS 17423. ISO 13184-2:2016 only specifies the RGP messages based on the DXM definition (see Annex B and Annex C) at real-time. The content of the RGP messages are based on the definition of road guidance use cases as documented in ISO 13184?1. This part of ISO 13184 implements ITS-SU objects, which is a general reference to ITS application objects, ITS message sets and other objects which may require globally unique identification and registration. The management of ITS-SU objects is many-fold, e.g. specified in ISO 24102?4, ISO 24102?5, ISO 24102?6, ISO 24102?7, ISO 24102?8 and ISO 24102?9, and in CEN/ISO/TS 17423. This part of ISO 13184 implements authorized and controlled operation of ITS-SU objects, which requires considerations of ITS-SU object identifiers, i.e. ITS-AID, ITS-MsgSetID, ITS-SUID, ITS-SCUID, addresses and protocol identifiers used in the communication protocol stack of an ITS-S, and others. NOTE The accuracy of the navigation and positioning system as input to the Road Guidance application is important for road guidance but is not part of the ISO 13184 series. Detailed information about crossroads is needed for implementation of Road Guidance applications.