ISO 14819-2:2021/Amd 1

Systèmes de transport intelligents — Informations sur le trafic et les déplacements via le codage de messages sur le trafic — Partie 2: Codes d'évènements et d'informations pour le système de radiodiffusion de données - canal de messages d'informations sur le trafic (RDS-TMC) avec Alert-C — Amendement 1

General Information

• Status: Not Published
• ICS: 03.220.20 - Road transport
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 10 - Traveller information systems
• Current Stage: 6000 - International Standard under publication
• Start Date: 20-Jun-2026
• Completion Date: 27-Jun-2026

Relations

• Consolidates: EN ISO 14819-2:2021/prA1:2025 - Intelligent transport systems - Traffic and travel information messages via traffic message coding - Part 2: Event and information codes for Radio Data System-Traffic Message Channel (RDS-TMC) using ALERT-C - Amendment 1 (ISO 14819-2:2021/DAmd1:2025)
• Effective Date: 12-Feb-2026
• Consolidates: ISO/IEC 30118-7:2021 - Information Technology – Open Connectivity Foundation (OCF) Specification — Part 7: Wi-Fi easy setup specification
• Effective Date: 21-Jun-2025
• Amends: ISO 14819-2:2021 - Intelligent transport systems — Traffic and travel information messages via traffic message coding — Part 2: Event and information codes for Radio Data System-Traffic Message Channel (RDS-TMC) using ALERT-C
• Effective Date: 07-Jun-2025

Overview

ISO 14819-2:2021/Amd 1 is an amendment to the international standard for intelligent transport systems (ITS), focusing on the communication of traffic and travel information messages. This amendment specifically addresses the event and information codes used in the Radio Data System-Traffic Message Channel (RDS-TMC) employing the ALERT-C protocol. Developed by ISO Technical Committee 204 (ISO/TC 204), this standard enhances the accuracy and consistency of traffic messages broadcasted to the public, supporting improved mobility and road safety.

Key Topics

• Traffic Message Coding: This amendment updates the coding system for event and information messages sent via the RDS-TMC, an essential component for real-time traffic communication in intelligent transport systems.
• ALERT-C Protocol: Reinforces the structure and clarity of ALERT-C, a widely used protocol for the transmission of urgent road and travel messages across Europe and many other regions.
• Event and Information Codes: Introduces new codes to expand the descriptive capabilities of RDS-TMC messages:
  • Code "186" and "due to national holiday" for Line 210
  • Code "187" and "due to regional holiday" for Line 211
• Support for Metric and Non-metric Units: Clarifies message text for both metric-unit and GB-English (non-metric) implementations, ensuring regional appropriateness in different markets.
• Standard Harmonization: Developed in close cooperation between ISO and the European standardization body CEN, enhancing interoperability across national and regional ITS deployments.

Applications

The implementation of ISO 14819-2:2021/Amd 1 offers tangible benefits to a variety of stakeholders in the intelligent transport ecosystem:

• Road Authorities and Traffic Management Centers utilize standardized codes to issue real-time, accurate, and easily interpretable travel warnings and advisories to drivers.
• Navigation System Providers integrate RDS-TMC message coding, ensuring that users receive up-to-date road event and condition details, such as traffic delays due to national or regional holidays.
• Broadcasters and Data Aggregators can efficiently include localized and timely event information in their traffic bulletins, both for FM radio broadcasts and other digital channels.
• Vehicle Manufacturers and Telematics Suppliers rely on internationally harmonized codes for consistent message interpretation in diverse geographic markets, simplifying system integration and compliance.
• End Users benefit from clear and actionable traffic information, supporting safer and more efficient travel decisions.

Related Standards

ISO 14819-2:2021/Amd 1 is part of the broader ISO 14819 series and works alongside several related standards for intelligent transport systems:

• ISO 14819-2:2021 – The foundational standard detailing the event and information coding for RDS-TMC using ALERT-C.
• ISO/TC 204 Standards – A suite of standards addressing various facets of ITS, including communication protocols, safety, and interoperability.
• CEN/TC 278 Standards – Complementary European standards relevant to intelligent transport systems, particularly for cross-border communications and European harmonization.

For those implementing ITS solutions, referencing the latest amendments and related standards ensures compliance, interoperability, and up-to-date service offerings in traffic and travel information systems. This amendment underscores ISO’s commitment to continuous improvement and stakeholder engagement in the evolving landscape of intelligent transport systems.

Standards Content (Sample)

International
Standard
ISO 14819-2
Third edition
Intelligent transport systems —
2021-02
Traffic and travel information
messages via traffic message
AMENDMENT 1
coding —
Part 2:
Event and information codes for
Radio Data System-Traffic Message
Channel (RDS-TMC) using ALERT-C
AMENDMENT 1
Systèmes de transport intelligents — Informations sur le trafic et
les déplacements via le codage de messages sur le trafic —
Partie 2: Codes d'évènements et d'informations pour le système
de radiodiffusion de données - canal de messages d'informations
sur le trafic (RDS-TMC) avec Alert-C
AMENDEMENT 1
PROOF/ÉPREUVE
Reference number
ISO 14819-2:2021/Amd.1:2026(en) © ISO 2026

ISO 14819-2:2021/Amd.1:2026(en)
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
ii
ISO 14819-2:2021/Amd.1:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights
...

ISO 14819-2:2021/AMPRF Amd 1:2026(en)
ISO/TC 204/WG 10
Secretariat: ANSI
Date: 2026-05-0722
Intelligent transport systems — Traffic and travel information
messages via traffic message coding — —
Part 2:
Event and information codes for Radio Data System-Traffic Message
Channel (RDS-TMC) using ALERT-C —
AMENDMENT 1
Systèmes de transport intelligents — Informations sur le trafic et les déplacements via le codage de messages
sur le trafic —
Partie 2: Codes d'évènements et d'informations pour le système de radiodiffusion de données - canal de
messages d'informations sur le trafic (RDS-TMC) avec Alert-C
AMENDEMENT 1
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PROOF
ISO 14819-2:2021/PRF Amd 1(en)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
iii
ISO 14819-2:2021/PRF Amd 1(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
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 documentsdocument 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).
Field Code Changed
Attention is drawnISO draws attentio
...

Norme
internationale
ISO 14819-2
Troisième édition
Systèmes de transport
2021-02
intelligents — Informations sur
le trafic et les déplacements via le
AMENDEMENT 1
codage de messages sur le trafic —
Partie 2:
Codes d'évènements et
d'informations pour le système de
radiodiffusion de données - canal
de messages d'informations sur le
trafic (RDS-TMC) avec Alert-C
AMENDEMENT 1
Intelligent transport systems — Traffic and travel information
messages via traffic message coding —
Part 2: Event and information codes for Radio Data System-
Traffic Message Channel (RDS-TMC) using ALERT-C
AMENDMENT 1
PROOF/ÉPREUVE
Numéro de référence
ISO 14819-2:2021/Amd.1:2026(fr) © ISO 2026

Norme
ISO 14819-2:2021/Amd.1:2026(fr)
internationale
ISO 14819-2
Troisième édition
Systèmes de transport
2021-02
intelligents — Informations sur
le trafic et les déplacements via le
AMENDEMENT 1
codage de messages sur le trafic —
Partie 2:
Codes d'évènements et
d'informations pour le système de
radiodiffusion de données - canal
de messages d'informations sur le
trafic (RDS-TMC) avec Alert-C
AMENDEMENT 1
Intelligent transport systems — Traffic and travel information
messages via traffic message coding —
Part 2: Event and information codes for Radio Data System-
Traffic Message Channel (RDS-TMC) using ALERT-C
AMENDMENT 1
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2026
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
PROOF/ÉPREUVE
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse Numéro de référence
ISO 14819-2:2021/Amd.1:2026(fr) © ISO 2026
PROOF/ÉPREUVE
ii
ISO 14819-2:2021/Amd.1:2026(fr)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux
de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général
confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de document ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L'ISO attire l'attention sur le fait que l
...