ISO 14819-2:2021/Amd 1:2026

• Status: Published
• Publication Date: 12-Jul-2026
• 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: 6060 - International Standard published
• Start Date: 13-Jul-2026
• Due Date: 06-Dec-2026
• Completion Date: 13-Jul-2026

• Consolidates: EN ISO 14819-2:2021/A1:2026 - Intelligente Transportsysteme – Verkehrs- und Reiseinformationen über Verkehrsmeldungskodierung – Teil 2: Ereignis- und Informationscodes für den digitalin Radiokanal für Verkehrsmeldungen (RDS-TMC) unter Nutzung von ALERT-C – Änderung 1 (ISO 14819-2:2021/Amd 1:2026)
• 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

ISO 14819-2:2021/Amd 1:2026 is an ISO amendment to ISO 14819-2:2021 for intelligent transport systems. It updates the event and information codes used in Radio Data System-Traffic Message Channel (RDS-TMC) messages encoded with ALERT-C by adding holiday-related message entries.

What does ISO 14819-2:2021/Amd 1:2026 specify?

ISO 14819-2:2021/Amd 1:2026 specifies targeted updates to the RDS-TMC event and information code lists in the base part. The amendment affects the main code table in Clause 4.2.2 and the corresponding multilingual presentation in Annex C.

Location	What it covers
4.2.2, Table 3	Main event and information code list used for RDS-TMC messages
Annex C, Table C.1	Corresponding wording in metric and non-metric text forms

In practice, this means the document is not a broad rewrite. It is a narrow maintenance amendment that extends the existing code set with holiday-specific wording so implementers can distinguish between national and regional holiday situations.

What are the key requirements of ISO 14819-2:2021/Amd 1:2026?

The amendment updates both the coded list and the displayed text. For anyone implementing or maintaining an RDS-TMC service, that means the same new entries need to appear in the machine-facing code set and in the user-facing text forms.

• Clause 4.2.2, Table 3 adds a new entry for a traffic or travel message related to a national holiday. In practice, systems that generate or decode RDS-TMC messages need a distinct code for that situation.
• Clause 4.2.2, Table 3 also adds a separate entry for a regional holiday. This matters when the event applies locally rather than across the whole country.
• Annex C, Table C.1 mirrors the national-holiday addition in the metric-language column used by CEN and in the GB-English column. This keeps the human-readable wording aligned with the code list.
• Annex C, Table C.1 mirrors the regional-holiday addition in the same way. Implementers should update message rendering so the holiday wording matches the chosen unit and language presentation.
• The amendment changes both text and code mapping. In practice, a conforming implementation should update message generation, decoding, content databases, and test cases together, not just one of them.
• The amendment is specific to the existing RDS-TMC coding structure using ALERT-C. That means it fits into an established traffic-message coding scheme rather than introducing a new format.

What terms does ISO 14819-2:2021/Amd 1:2026 define?

RDS-TMC means Radio Data System-Traffic Message Channel, the broadcast channel used to carry traffic message codes.

ALERT-C is the coding method used with RDS-TMC in this part of the ISO 14819 series.

An event code is the coded identifier used to represent a traffic or travel situation.

An information code is a coded identifier for additional traffic-related information that can be carried in the message system.

Metric units (language as used by CEN) is the wording form used in Annex C for the metric presentation.

GB-English is the non-metric English wording form used in Annex C.

Who uses ISO 14819-2:2021/Amd 1:2026?

ISO 14819-2:2021/Amd 1:2026 is used by organizations that build, maintain, or validate RDS-TMC traffic information services. That includes traffic information providers, ITS integrators, navigation and in-vehicle system developers, and teams that manage code lists or message databases.

Quality and conformity teams use it to check that holiday-related messages are encoded and displayed consistently. Road transport and mobility organizations use it when they need standardized wording for traffic and travel information services.

What changed in ISO 14819-2:2021/Amd 1:2026 from the previous edition?

ISO 14819-2:2021/Amd 1:2026 adds two holiday-related message entries to the existing code lists: one for messages due to a national holiday and one for messages due to a regional holiday. The same additions are made in Annex C so the coded form and the displayed wording stay aligned.

What does the ISO 14819-2:2021/Amd 1:2026 document contain?

This amendment is short and focused. It gives the exact update instructions for Table 3 in Clause 4.2.2 and for Table C.1 in Annex C, where the new holiday-related entries are inserted into the existing structure.

It is intended for implementation work, code list maintenance, and validation of RDS-TMC message content. The document does not describe a new system; it changes the wording and code mapping for two specific traffic-message cases within the existing ISO 14819-2 framework.

International
Standard
ISO 14819-2
Third edition
Intelligent transport systems —
2021-02
Traffic and travel information
messages via traffic message
AMENDMENT 1
coding —
2026-07
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
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
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
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has been established has the right to be represented on that committee. International organizations,
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The procedures used to develop this document and those intended for its further maintenance are described
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of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
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ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
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ri
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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 —
2026-07
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
Numéro de référence
ISO 14819-2:2021/Amd.1:2026(fr) © ISO 2026

ISO 14819-2:2021/Amd.1:2026(fr)
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
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse
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
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partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
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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 la mise en application du présent document peut entraîner l'utilisation
d'un ou de plusieurs brevets. L'ISO ne prend pas position quant à la preuve, à la validité et à l'applicabilité de
tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l'ISO n'avait pas
reçu notification qu'un ou plusieur
...