本文件规定了位置参考规则，以满足交通的具体要求 信息通道（TMC）系统，使用缩写编码格式提供交通和旅行 通过移动载体（如GMS、DAB）或通过DATEX等交换协议发送的信息（TTI）消息 二、具体而言，这些规则涉及无线电数据系统交通信息频道（RDS-TMC），这是一种 通过调频广播电台上的静音数据频道向旅行者提供数字编码的TTI ALERT-C协议。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies location referencing rules to address the specific requirements of Traffic Message Channel (TMC) systems, which use abbreviated coding formats to provide traffic and travel information (TTI) messages over mobile bearers (e.g. GMS, DAB) or via exchange protocols like DATEX II. In particular, the rules address the Radio Data System-Traffic Message Channel (RDS-TMC), a means of providing digitally-coded TTI to travellers using a silent data channel on FM radio stations, based on the ALERT-C protocol.All current amendments available at time of purchase are included with the purchase of this document.