What is ISO 14819‑3 about?
ISO 14819‑3 specifies location referencing rules to address the specific requirements of Traffic Message Channel (TMC) systems, which use abbreviated coding formats to provide traffic and travel information (TTI) messages over mobile bearers or via exchange protocols like DATEX II.
ISO 14819‑3 specifies the rules to address the Radio Data System-Traffic Message Channel (RDS-TMC), a means of providing digitally coded TTI to travellers using a silent data channel on FM radio stations, based on the ALERT-C protocol.
ISO 14819‑3 sets out ways of specifying places and positions in traffic and travel information messages, including RDS-TMC messages (the Radio Data System-Traffic Message Channel).
ISO 14819‑3 defines the structure and semantics of location tables for Traffic Information Centres (TICs) and receivers.
Who is ISO 14819‑3 for?
ISO 14819‑3 on location referencing for Radio Data System — Traffic Message Channel (RDS-TMC) using ALERT-C is useful for:
- Traffic management department
- Vehicle Manufacturing company
- RDS-TMC system developer
- Traveller Information Services Association
- Service providers
- Broadcasters
Why should you use ISO 14819‑3?
The location referencing component of a traffic and travel message enables a service provider to indicate the physical location of the event being described. The management of TMC location databases requires on-going maintenance. It is necessary to both manage location database ID allocation for countries implementing TMC services and to validate new and updated location databases when ground features change. These activities are led by service providers who also need to ensure that their end-users are kept up-to-date.
ISO 14819‑3 primarily addresses the needs of RDS-TMC ALERT-C messages which are in widespread worldwide use. The modular approach used here is intended to facilitate future extension of the location referencing rules to other traffic and travel messaging systems.
ISO 14819‑3 defines the structure and semantics of location tables for Traffic Information Centres (TICs) and receivers. This is helpful in following ways:
- Traffic and travel information is created and updated in an originating database, by human operators or automated systems. Information is transferred to one or more remote systems by means of messages.
- In this context, a message is a collection of data which is exchanged to convey information for an agreed purpose between two or more parties. Traffic and travel messages are digitally-coded sets of data exchanged by interested parties, which convey information about traffic, travel and/or transport networks. Digital coding may be alphanumeric, as in EDIFACT, or binary, as in RDS-TMC.
- The traffic and travel messages developed in programmes of the European Union are open, non-proprietary proposals for standards intended to serve the public interest by facilitating interconnection and interoperability of the relevant information systems.
What’s changed since the last update?
BS EN ISO 14819‑3:2021 supersedes BS EN ISO 14819‑3:2013. BS EN ISO 14819‑3:2021 includes some technical changes with respect to BS EN ISO 14819‑3:2013. These include:
- Location Table Exchange Format 24
- Reuse-of-location-codes
- Roads-and-Junction-number-translation
- Language identifiers
- Coding of isolated areas