Overview
CEN ISO/TS 18234-6:2006 (TPEG-Loc) specifies the location referencing method for Traffic and Travel Information (TTI) delivered via TPEG (Transport Protocol Expert Group) data‑streams. It defines how location information is packaged, encoded and decoded so TPEG applications (for example TPEG-RTM and TPEG-PTI) can present precise, language‑independent locations to end users and navigation systems. The Technical Specification ensures that a client TPEG decoder receives both event and location data required for display, filtering and map matching.
Keywords: TPEG, TPEG-Loc, ISO/TS 18234-6, traffic and travel information, location referencing, TTI, TPEG-RTM, TPEG-PTI.
Key Topics
- Location container concepts - unified container model for all TPEG location types.
- Structure of TPEG-Loc - organization of location objects and references used across applications.
- Coding and encoding rules - how location data bytes are formatted for transport, including machine‑readable encodings.
- Application primitives - basic operations and data elements decoders use to interpret locations.
- Compatibility with ILOC method - guidance for encoding/decoding when using TPEG location coordinates and backward mapping.
- Encoder and decoder rules - normative rules to ensure interoperable implementations and reliable map‑matching.
- Use of TPEG‑Loc tables - word/dictionary tables to present human‑readable, language‑independent location descriptions.
All above topics are defined at the data‑structure and protocol level (no implementation source code is included).
Applications
- Delivering precise, location‑referenced traffic events (accidents, closures) to in‑vehicle navigation and mobile apps.
- Enabling map‑matching in “thick” clients (navigation systems) and readable location descriptions in “thin” clients (handheld travel assistants).
- Supporting multi‑application TPEG services and user filtering (urban/inter‑urban, multi‑modal journeys).
- Broadcasting TTI over various digital bearers while maintaining consistent location semantics.
Who uses this standard
- ITS system integrators and service providers creating TPEG streams.
- Navigation OEMs and map providers implementing TPEG decoders and map‑matching.
- Broadcasters and telematics operators distributing TTI services.
- Software developers building TPEG‑compatible client devices and travel information platforms.
Related Standards
This specification is essential for interoperable, location‑aware TTI delivery and for implementing robust TPEG decoders that serve both human users and automated navigation systems.
