Overview
ISO/TS 18234-9:2013 specifies the TPEG application Traffic Event Compact (TPEG1‑TEC) - a binary data format for encoding concise traffic event messages in Intelligent Transport Systems (ITS). Part of the ISO/TS 18234 series, TPEG1‑TEC is designed to represent traffic events (road works, congestion, local hazard warnings such as black ice or unexpected obstacles) in a compact, byte‑oriented stream suitable for delivery over a variety of digital bearers to navigation systems, broadcasting services and telematics clients.
Key topics and requirements
- Binary data format (TPEG1): Defines the on‑air, byte‑oriented encoding used by the TPEG1 generation for TEC messages, enabling efficient transmission and decoding.
- Application framing & signalling: Rules for application identification, version number signalling (e.g., technical version TPEG‑TEC_3.0/001), message framing and application‑specific constraints to ensure interoperability.
- Message components: Structured components including MessageManagement, location containers, and Event constructs to describe cause, effect and scope of traffic events.
- Datatypes and code tables: Standardized tables and data types to represent event attributes - examples include EffectCode, CauseCode, WarningLevel, LaneRestriction, AdviceCode, Tendency, and VehicleType. These promote consistent semantics across providers and receivers.
- Annexes (normative): Detailed binary syntax and SSF (syntax, semantics and framing) definitions, including primitive and compound binary types and the TPEG Message Management Container (MMC) for multi‑part/monolithic message handling.
- Design practices: Use of UML modelling and tooling to derive binary syntax and populate the specification, supporting automated generation and consistent implementations.
Applications
- Delivering compact, prioritized traffic event and hazard warnings to in‑vehicle navigation systems and portable devices.
- Broadcasting road event information over digital radio, mobile networks or other digital bearers to enable filtered presentation and machine‑readable agent actions.
- Integration into navigation and telematics platforms for routing, driver alerts, and safety‑critical warnings (local hazard high‑priority messages).
Who should use this standard
- ITS service providers and traffic data aggregators
- Navigation system manufacturers and map providers
- Automotive OEMs and telematics vendors
- Broadcasters and digital radio platforms implementing TPEG services
- Software developers building decoding/encoding libraries for traffic event messaging
Related standards
- ISO/TS 18234 (other parts): TPEG1‑INV, TPEG1‑SSF, TPEG1‑SNI, TPEG1‑RTM, PTI, Location Referencing, PK1, CTT, CAI, LRC - all forming the TPEG1 framework for traffic and travel information.
Keywords: ISO/TS 18234-9, TPEG1‑TEC, Traffic Event Compact, TPEG, ITS, traffic and travel information, binary data format, hazard warnings.