Overview
CEN ISO/TS 18234-9:2013 specifies the TPEG1 Traffic Event Compact (TPEG1‑TEC) application for exchanging traffic and travel information in a compact binary data format. Part of the TPEG (Transport Protocol Experts Group) family, this ISO Technical Specification is focused on efficient delivery of traffic event data - for example, road works, congestion and local hazard warnings (safety‑related messages such as black ice, accidents or obstacles). TPEG1‑TEC is intended for broadcast and point‑to‑point distribution where compact, unambiguous binary encoding is required.
Key topics and technical requirements
- Application framing and signalling: rules for application identification, version number signalling and framing so receivers can detect and parse TPEG1‑TEC streams.
- Message components: structured definitions of the TECMessage, including MessageManagement, location containers (instances of location data), and Event objects describing traffic incidents.
- Datatypes and binary syntax: normative binary SSF definitions and primitive/compound data types for compact encoding of messages.
- TEC tables and codes: standardized code lists (e.g., tec001 EffectCode, tec002 CauseCode, tec003 WarningLevel, tec004 LaneRestriction, tec005 AdviceCode, tec006 Tendency, tec007 RestrictionType, tec008 DiversionRoadType, tec009 VehicleType, plus SubCause/SubAdvice) for interoperable semantics.
- Message management container (MMC): definitions for monolithic and multi‑part message management (see Annex B) supporting reliable reassembly and lifecycle of TPEG messages.
- Normative annexes: binary representation, toolkit guidance, stream description and tables to ensure consistent implementation.
Applications and who uses it
TPEG1‑TEC is used by:
- Traffic service providers and broadcasters to encode and deliver compact traffic event data over DAB, DVB, IP or cellular broadcast channels.
- In‑vehicle navigation OEMs and aftermarket device makers to decode compact traffic events for route guidance and driver alerts.
- ITS integrators and roadside authorities for exchanging standardized incident/hazard reports.
- App developers and back‑end service platforms that aggregate, process or re‑distribute traffic and travel information.
- Safety and emergency services where high‑priority local hazard warnings must be delivered promptly.
Benefits include low bandwidth overhead, standardized semantics (improved interoperability) and explicit support for high‑priority safety messages.
Related standards
- Other parts of ISO/TS 18234 (TPEG1 family) covering alternative TPEG applications and transport layers.
- Regional or broadcast profiles that map TPEG to DAB/DVB/IP delivery channels.
Keywords: TPEG1, TPEG1‑TEC, ISO/TS 18234‑9:2013, traffic event compact, intelligent transport systems, traffic and travel information, binary data format, local hazard warnings, Message Management Container.