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 amendment 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-oktober-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/Amd1:2026)
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)
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/Amd1:2026)
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/Amd 1:2026)
Ta slovenski standard je istoveten z: EN ISO 14819-2:2021/A1:2026
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.
EN ISO 14819-2:2021/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2026
EUROPÄISCHE NORM
ICS 03.220.20; 35.240.60
English Version
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)
Systèmes de transport intelligents - Informations sur le Intelligente Transportsysteme - Verkehrs- und
trafic et les déplacements via le codage de messages Reiseinformationen über Verkehrsmeldungskodierung
sur le trafic - Partie 2: Codes d'évènements et - Teil 2: Ereignis- und Informationscodes für den
d'informations pour le système de radiodiffusion de digitalen Radiokanal für Verkehrsmeldungen (RDS-
données - canal de messages d'informations sur le TMC) unter Nutzung von ALERT-C - Änderung 1 (ISO
trafic (RDS-TMC) avec Alert-C - Amendement 1 (ISO 14819-2:2021/Amd1:2026)
14819-2:2021/Amd 1:2026)
This amendment A1 modifies the European Standard EN ISO 14819-2:2021; it was approved by CEN on 17 March 2026.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14819-2:2021/A1:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 14819-2:2021/A1:2026) has been prepared by Technical Committee
ISO/TC 204 "Intelligent transport systems" in collaboration with Technical Committee CEN/TC 278
“Intelligent transport systems” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2027, and conflicting national standards shall
be withdrawn at the latest by January 2027.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
...