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)
General Information
- Abstract
- 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
Overview
SIST EN ISO 14819-2:2021/A1:2026 is an amendment to the international standard for intelligent transport systems, specifically focused on traffic and travel information messages. This amendment addresses event and information codes used in the Radio Data System-Traffic Message Channel (RDS-TMC) with the ALERT-C protocol. By updating the coding schemes used for transmitting traffic event data via radio, the standard enhances interoperability and accuracy in real-time traffic broadcasts.
The amendment was developed by ISO/TC 204 on Intelligent Transport Systems and aligns with the ongoing partnership between ISO and the European Committee for Standardization (CEN). The document is targeted at organizations, public authorities, and technology providers engaged in developing or integrating traffic and travel information services.
Key Topics
Event and Information Codes Expansion
The amendment specifies new codes in the event and information tables used for broadcasting through RDS-TMC. This ensures more accurate communication of real-world traffic situations.Supplementary Information Updates
The addition of event differentiation based on national and regional holidays improves the context of traffic messages, allowing for more specific cause-and-effect identification in traffic flow disruptions.Table and Annex Modifications
Key tables within the standard have been updated, ensuring consistency across both metric and non-metric unit systems. This harmonization supports both continental and UK-specific broadcast requirements in Europe.Continuous Compatibility with ALERT-C
Ensures that all new codes remain compatible with the established ALERT-C protocol, facilitating interoperability for both legacy and new systems deploying RDS-TMC.
Applications
SIST EN ISO 14819-2:2021/A1:2026 finds practical use in a variety of traffic and transport applications, advancing the capabilities of intelligent transport systems and connected vehicle technologies:
Traffic Information Broadcasting
Local, regional, and national broadcasters use the updated codes to inform drivers about incidents, road closures, or congestion due to holidays, increasing public awareness and route planning accuracy.Navigation and Infotainment Systems
Automotive manufacturers and Tier-1 suppliers implement these codes in onboard navigation systems, supporting real-time rerouting and journey optimization for end-users.Transport Management and Emergency Response
Public authorities and traffic management centers integrate the revised code tables into their operational platforms, enabling more precise response to unusual traffic conditions, such as those caused by special events or holidays.International Harmonization
By following the extended code list, cross-border and pan-European traffic information services can provide consistent messages, minimizing driver confusion and supporting cross-jurisdictional transport efficiency.
Related Standards
For organizations and stakeholders involved in transport telematics and traffic information dissemination, the following related standards may be of interest:
ISO 14819-2:2021
The base standard establishing event and information code structures for RDS-TMC using ALERT-C.ISO 14819 Series
Covering other parts relevant to traffic message coding, such as system requirements and message management for intelligent transport systems.EN ISO 14819-2:2021/prA1:2025
The European draft amendment equivalent to this standard, ensuring harmonization across EU member states.ICS 03.220.20
Standards related to road transport.ICS 35.240.60
Standards for IT applications in transport.
By adopting SIST EN ISO 14819-2:2021/A1:2026, organizations can enhance the reliability and relevance of their traffic message services, ensuring compliance with current best practices and international requirements for intelligent transport communications.
Relations
- Effective Date
- 29-Jul-2026
- Effective Date
- 29-Jul-2026
- Effective Date
- 01-Oct-2026
Get Certified
Connect with accredited certification bodies for this standard
BSI Group
BSI (British Standards Institution) is the business standards company that helps organizations make excellence a habit.
Great Wall Tianjin Quality Assurance Center
Established 1993, first batch to receive national accreditation with IAF recognition.
Hong Kong Quality Assurance Agency (HKQAA)
Hong Kong's leading certification body.
Sponsored listings
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
...