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
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Intelligent Transport Systems: Build digital, data-driven infrastructure for efficient road transport and travel management.
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Traffic Message Coding (TMC): Standardized format for encoding and transmitting traffic and travel event information to end-users via FM radio broadcasts.
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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.
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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.
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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:
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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.
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Traffic Management Centers: Standardize event communications to ensure accurate broadcasts of travel conditions and incidents to large audiences.
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Broadcasters and Service Providers: Consistent messaging across all equipped vehicles and radio receivers, reducing confusion and improving public information services.
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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.
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International and Regional ITS Deployments: Adoption of updated codes ensures interoperability for cross-border traffic information flows throughout Europe and beyond.
Related Standards
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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.
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EN ISO 14819 Series: Covers all parts related to traffic and travel message coding, including requirements for message management, event lists, and system architecture.
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ISO/TC 204 (Intelligent Transport Systems): The technical committee responsible for international ITS standards, promoting harmonization and integration of transport information systems.
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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.
