Overview
ISO 14819-2:2021/Amd 1:2026 is an amendment to the international standard for intelligent transport systems (ITS), specifically addressing traffic and travel information messages transmitted via traffic message coding. This amendment updates Part 2, focusing on event and information codes for the Radio Data System-Traffic Message Channel (RDS-TMC) using ALERT-C protocol. RDS-TMC is a widely utilized technology for broadcasting real-time traffic information to motorists, supporting efficient route planning and enhancing road safety.
With the publication of Amendment 1, the standard introduces new event and information codes that expand the precision and utility of RDS-TMC messaging, especially for event-specific traffic updates related to holidays. This ensures seamless communication of relevant travel disruptions and event impacts across intelligent transport systems.
Key Topics
- Intelligent Transport Systems (ITS): Emphasizes the importance of standardized traffic and travel information exchange to enhance transportation efficiency and safety.
- RDS-TMC and ALERT-C Protocol: Focuses on the use of RDS-TMC technology and the standardized ALERT-C protocol for transmitting coded traffic information via FM radio.
- Event and Information Codes Update: Introduces new codes to the existing structure to provide more detailed explanations for traffic events, improving information distinction and contextual relevance.
- Table Amendments: Amendment 1 specifically updates tables in the main body and annexes:
- Addition of codes (186 and 187) for "due to national holiday" and "due to regional holiday" in both standard and GB-English text contexts.
Applications
This standard amendment is highly relevant for organizations working on traffic information broadcasting, ITS infrastructure providers, public agencies, and developers of in-vehicle navigation or traffic alert systems. Focusing on ITS interoperability, ISO 14819-2:2021/Amd 1:2026 brings the following practical value:
- Enhanced Traffic Information Accuracy: New codes enable more granular communication of event-related disruptions, such as holiday-related traffic impacts, facilitating timely warnings for end users.
- Consistency Across Borders: By aligning terminology and codes internationally, RDS-TMC services maintain reliability and compatibility for multinational travelers and service operators.
- Navigation System Integration: Automotive manufacturers and software developers benefit from updated codes, ensuring driver information systems provide up-to-date and context-aware traffic reports.
- Traffic Management Optimization: Public authorities and traffic management centers can broadcast standardized alerts, aiding congestion management and emergency response, especially during significant events like national and regional holidays.
- Language and Unit Support: The amendment addresses both metric and non-metric unit contexts, catering to various regional needs and enhancing message clarity for local and international audiences.
Related Standards
For comprehensive implementation and compliance, organizations may wish to consult the following associated and related standards:
- ISO 14819-1: General specifications and framework for traffic and travel information messages via RDS-TMC.
- ISO 14819-3: Detailed guidelines for location tables, integral to accurate regional message coverage.
- ISO 21219 Series: Standards for Traffic and Traveller Information (TTI) using the TPEG protocol, offering additional options for ITS data exchange.
- CEN/TC 278 Standards: European standards on intelligent transport systems, developed in cooperation with ISO for broader interoperability within Europe.
By adopting the amendment to ISO 14819-2, stakeholders enhance their ability to deliver timely, detailed, and internationally consistent traffic and travel messages, supporting safer and more efficient journeys throughout the global transport network.
Open preview (PDF)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
