EN ISO 14819-2:2021/A1:2026
(Amendment)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/Amd 1:2026)
General Information
- Abstract
- Status
- Published
- Publication Date
- 21-Jul-2026
- Technical Committee
- CEN/TC 278 - Road transport and traffic telematics
- Drafting Committee
- CEN/TC 278/WG 4 - Traffic and traveller information (TTI)
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 22-Jul-2026
- Completion Date
- 22-Jul-2026
Overview
EN ISO 14819-2:2021/A1:2026 is an amendment to the international standard for Intelligent Transport Systems (ITS), focusing on traffic and travel information messages using traffic message coding. Specifically, this amendment addresses event and information codes for the Radio Data System-Traffic Message Channel (RDS-TMC) implemented via the ALERT-C protocol. Developed collaboratively by ISO and CEN technical committees, this amendment enhances the comprehensiveness and usability of RDS-TMC event coding, facilitating more accurate and regionally relevant dissemination of road and travel information across Europe and globally.
Key Topics
Intelligent Transport Systems: Build digital, data-driven infrastructure for efficient road transport and travel management.
Traffic Message Coding (TMC): Standardized format for encoding and transmitting traffic and travel event information to end-users via FM radio broadcasts.
RDS-TMC with ALERT-C: Protocol enabling real-time, coded messages to be delivered to in-car navigation and driver information systems using the Radio Data System.
Amendment Highlights:
- Addition of event codes for holidays:
- "Due to national holiday" (code 186)
- "Due to regional holiday" (code 187)
- Updates to supplementary information lists and consistent application across metric and non-metric unit tables.
- Addition of event codes for holidays:
International Harmonization: Supports alignment of ITS communication protocols across national and regional boundaries.
Applications
The enhancements in EN ISO 14819-2:2021/A1:2026 directly support a range of practical applications:
In-Car Navigation Systems: Enrich the data delivered to drivers about travel disruptions caused by national or regional holidays, enabling better trip planning and safer journeys.
- Automated rerouting based on holiday-related road closures or congestion.
Traffic Management Centers: Standardize event communications to ensure accurate broadcasts of travel conditions and incidents to large audiences.
Broadcasters and Service Providers: Consistent messaging across all equipped vehicles and radio receivers, reducing confusion and improving public information services.
Public Sector and Road Operators: Enhanced ability to inform the public of travel restrictions or expected delays during public holidays, leading to improved resource allocation and incident response.
International and Regional ITS Deployments: Adoption of updated codes ensures interoperability for cross-border traffic information flows throughout Europe and beyond.
Related Standards
EN ISO 14819-2:2021: The main standard for the event and information codes used in RDS-TMC via ALERT-C, providing foundational definitions and structures.
EN ISO 14819 Series: Covers all parts related to traffic and travel message coding, including requirements for message management, event lists, and system architecture.
ISO/TC 204 (Intelligent Transport Systems): The technical committee responsible for international ITS standards, promoting harmonization and integration of transport information systems.
CEN/TC 278 (Intelligent transport systems): European standardization body involved in the parallel process for ITS standards development.
Practical Value
Implementing EN ISO 14819-2:2021/A1:2026 provides several benefits for intelligent mobility stakeholders:
- Improved Data Accuracy: With specific codes for holiday-related events, traffic information is more context-aware.
- Enhanced User Experience: Road users receive timely, relevant updates on factors impacting their journeys.
- Interoperability: Facilitates consistent communication across markets and borders, key for international transportation corridors.
For organizations and agencies implementing or updating intelligent transport systems, timely adoption of this amendment ensures continued compliance and optimal service to end-users relying on accurate traffic information delivered through RDS-TMC using ALERT-C protocols.
Relations
- Effective Date
- 29-Jul-2026
- Effective Date
- 29-Jul-2026
- Effective Date
- 12-Feb-2026
- Effective Date
- 11-Jun-2025
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Frequently Asked Questions
EN ISO 14819-2:2021/A1:2026 is a draft published by the European Committee for Standardization (CEN). Its full title is "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/Amd 1:2026)". This standard covers: 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/Amd 1:2026)
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/Amd 1:2026)
EN ISO 14819-2:2021/A1:2026 is classified under the following ICS (International Classification for Standards) categories: 03.220.20 - Road transport; 35.240.60 - IT applications in transport. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 14819-2:2021/A1:2026 has the following relationships with other standards: It is inter standard links to EN 62106:2009, CEN/TS 14821-6:2003, ISO 14819-2:2021/Amd 1:2026, EN ISO 14819-2:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 14819-2:2021/A1:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2026
Inteligentni transportni sistemi - Sporočila prometnih in potovalnih informacij prek
kodiranih prometnih sporočil - 2. del: Kode za dogodke in informacije za radijski
podatkovni sistem (RDS) - Prometni informacijski kanal (RDS-TMC), ki uporablja
sistem ALERT-C - Dopolnilo A1 (ISO 14819-2:2021/DAmd1:2025)
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)
Intelligente Transportsysteme - Verkehrs- und Reiseinformationen über
Verkehrsmeldungskodierung - Teil 2: Ereignis- und Informationscodes für den digitalen
Radiokanal für Verkehrsmeldungen (RDS-TMC) unter Nutzung von ALERT-C -
Änderung 1 (ISO 14819-2:2021/DAmd1:2025)
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 (ISO 14819-2:2021/DAmd1:2025)
Ta slovenski standard je istoveten z: EN ISO 14819-2:2021/prA1:2025
ICS:
03.220.20 Cestni transport Road transport
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
Amendment
ISO 14819-2:2021/
DAM 1
ISO/TC 204
Intelligent transport systems —
Secretariat: ANSI
Traffic and travel information
messages via traffic message
Voting begins on:
2025-11-24
coding —
Voting terminates on:
Part 2: 2026-02-16
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
ICS: 03.220.20; 35.240.60
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO 14819-2:2021/DAM 1:2025(en)
DRAFT
ISO 14819-2:2021/DAM 1:2025(en)
Amendment
ISO 14819-2:2021/
DAM 1
ISO/TC 204
Intelligent transport systems —
Secretariat: ANSI
Traffic and travel information
messages via traffic message
Voting begins on:
coding —
Voting terminates on:
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
ICS: 03.220.20; 35.240.60
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopyin
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