ISO 14819-3:2021 高度道路交通システム—交通メッセージコーディングによる交通および旅行情報メッセージ—パート3：無線データシステムの位置参照-ALERT-Cを使用した交通メッセージチャネル（RDS-TMC） | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 278, Intelligent transport systems, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 14819-3:2013), which has been technically revised.

The main changes compared to the previous edition are as follows:

The following TISA specifications were integrated:

• Location Table Exchange Format 24.
• Reuse-of-location-codes.
• Roads-and-Junction-number-translation.
• Coding of isolated areas.
• Language identifiers.
• Backward compatibility.
• Coding of name translations and languages in TMC tables.
• DLR methods for locations in TMC Location.

A list of all parts in the ISO 14819 series can be found on the ISO website.

Introduction

This document primarily addresses the needs of RDS-TMC ALERT-C messages which are in widespread worldwide use. The modular approach used here is intended to facilitate future extension of the location referencing rules to other traffic and travel messaging systems.

This document sets out ways of specifying places and positions in traffic and travel information messages, including RDS-TMC messages (the Radio Data System-Traffic Message Channel).

It defines the structure and semantics of location tables for Traffic Information Centres (TICs) and receivers.

• a) Traffic and travel messages:
  • 1) Traffic and travel information is created and updated in an originating database, by human operators or automated systems. Information is transferred to one or more remote systems by means of messages.
  • 2) In this context, a message is a collection of data which is exchanged to convey information for an agreed purpose between two or more parties. Traffic and travel messages are digitally-coded sets of data exchanged by interested parties, which convey information about traffic, travel and/or transport networks. Digital coding may be alphanumeric, as in EDIFACT, or binary, as in RDS-TMC.
  • 3) The traffic and travel messages developed in programmes of the European Union are open, non-proprietary proposals for standards intended to serve the public interest by facilitating interconnection and interoperability of the relevant information systems.

• b) Location referencing.

1 Scope

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.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms, definitions and abbreviated terms

No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

For the purposes of this document, the following abbreviated terms apply:

Bibliography