SIST 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)
- Status
- Published
- Public Enquiry End Date
- 11-Feb-2026
- Publication Date
- 13-Sep-2026
- Technical Committee
- ITC - Information technology
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 13-Aug-2026
- Due Date
- 18-Oct-2026
- Completion Date
- 14-Sep-2026
SIST EN ISO 14819-2:2021/A1:2026 is a CEN amendment to the European standard for traffic and travel information messages coded for Radio Data System-Traffic Message Channel (RDS-TMC) using ALERT-C. It updates the event and information code list in EN ISO 14819-2:2021 so road-traffic systems can add the new holiday-related message entries in a consistent way.
What does SIST EN ISO 14819-2:2021/A1:2026 specify?
SIST EN ISO 14819-2:2021/A1:2026 specifies a narrow update to the code tables used for RDS-TMC traffic messages. The amendment works with the base standard and adds new holiday-related entries in the main code table and in Annex C.
The document is organized around the amendment instructions for:
- Clause 4.2.2, Table 3
- Annex C, Table C.1
In practice, that means users update both the core code list and the annex presentation so messages and implementations stay aligned.
What are the key requirements of SIST EN ISO 14819-2:2021/A1:2026?
SIST EN ISO 14819-2:2021/A1:2026 makes two coordinated additions to the RDS-TMC event and information code set. The same new message concepts appear in the main table and in Annex C, so implementers must reflect both places when they update software, data files or message catalogs.
Clause 4.2.2, Table 3
The amendment adds one event/information entry for a traffic situation linked to a national holiday and one for a similar situation linked to a regional holiday. In practice, this lets a traffic information provider distinguish holiday-related traffic conditions instead of using a generic event.
Annex C, Table C.1
Annex C adds the same two entries in the annex presentation used for CEN wording. This matters for documentation, localized outputs and systems that rely on the annex tables as the human-readable reference.
The key practical effect is simple: if a system encodes or displays RDS-TMC event and information messages, its code list needs to include the new holiday-related entries in both the main table and the annex mirror.
What terms does SIST EN ISO 14819-2:2021/A1:2026 define?
SIST EN ISO 14819-2:2021/A1:2026 uses the main terms and abbreviations of the underlying RDS-TMC standard.
- RDS-TMC - Radio Data System-Traffic Message Channel, the broadcast channel used to carry coded traffic messages.
- ALERT-C - the coding system used with RDS-TMC in this part for traffic event and information messages.
- ITS - Intelligent transport systems, the wider application area for the standard.
- CEN - European Committee for Standardization, the European standards body that adopted this amendment.
- ISO - International Organization for Standardization, the international standards body that published the amendment.
- traffic message coding - the method of turning traffic and travel information into coded messages that systems can transmit and interpret.
Who uses SIST EN ISO 14819-2:2021/A1:2026?
SIST EN ISO 14819-2:2021/A1:2026 is used by engineers and product teams working on ITS services that create, transmit or decode RDS-TMC traffic messages. It is also relevant to service operators, integrators and quality managers who maintain message catalogs or verify that traffic-event coding matches the standard.
In practice, people use it when they:
- update message databases
- implement broadcast traffic-information software
- check that coding tables and message outputs match the standard
- maintain road transport information services
What changed in SIST EN ISO 14819-2:2021/A1:2026 from the previous edition?
SIST EN ISO 14819-2:2021/A1:2026 is Amendment 1 to EN ISO 14819-2:2021. It adds holiday-related event and information entries in Clause 4.2.2, Table 3, and the matching entries in Annex C, Table C.1.
Which standards are used with SIST EN ISO 14819-2:2021/A1:2026?
SIST EN ISO 14819-2:2021/A1:2026 is the European adoption of ISO 14819-2:2021/Amd 1:2026. It modifies EN ISO 14819-2:2021, so users apply it together with that base standard.
What does the SIST EN ISO 14819-2:2021/A1:2026 document contain?
The document contains the European foreword, the endorsement notice, and the amendment instructions. The technical content is limited to the updates in Clause 4.2.2, Table 3, and Annex C, Table C.1.
For readers, that means the document is mainly a change notice, not a full rewrite of the traffic-code standard. For implementers, the important task is to carry the new entries into code lists, software, documentation and any generated message output that follows the standard.
Relations
- Effective Date
- 29-Jul-2026
- Effective Date
- 29-Jul-2026
- Effective Date
- 01-Oct-2026
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Frequently Asked Questions
SIST EN ISO 14819-2:2021/A1:2026 is a amendment published by the Slovenian Institute for Standardization (SIST). 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)
SIST 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.
SIST EN ISO 14819-2:2021/A1:2026 has the following relationships with other standards: It is inter standard links to SIST-TS CEN/TS 14821-6:2003, SIST EN 62106:2010, SIST EN ISO 14819-2:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST 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
...