Overview
ISO/TS 24315-1:2025 - part of the ISO 24315 series on the Management of Electronic Traffic Regulations (METR) - is a Technical Specification that defines the vocabulary used across METR documents. METR provides a framework for publishing trustworthy, authoritative, machine‑interpretable electronic traffic regulations (rules for speed limits, signalized intersections, lane use, micromobility, freight, public transport, etc.). The vocabulary standard supports consistent terminology for rule representation, distribution, verification and discrepancy handling across intelligent transport systems (ITS).
Key Topics
- Defined term sets covering jurisdictional, data, architectural, transport and trustworthiness concepts (e.g., rule state, rule publication, discrepancy state, METR roles and services).
- Data and metadata concepts for machine‑interpretable rules, including digital signatures and provenance to ensure authoritative, verifiable rule sources.
- Rule types and lifecycle: static vs dynamic rules (e.g., static speed limits and variable speed limits, signalized intersections), rule publication and state management.
- Information flow and distribution characteristics: pre‑announced vs emergent rules; wide‑area vs local distribution; pull vs push delivery mechanisms.
- Trustworthiness and discrepancy processes: terminology for authenticity, freshness, discrepancy reporting and correction workflows.
- Interoperability orientation: semantic interoperability focus with regional adaptation and legacy format compatibility (e.g., TN‑ITS, DATEX II, TPEG2, TransModel, TMDD, WZDx mentioned as data sources to be aligned with METR).
Applications
- Enabling driving automation systems (Levels 1–5) and driver information systems to obtain machine‑readable legal traffic rules for safe operation, legal compliance and traffic efficiency.
- Providing a common terminology for system architects, software developers, road authorities, and service providers who design METR systems, rule repositories, roadside units and in‑vehicle applications.
- Supporting national and regional implementations that require consistent semantics when converting legislation into electronic rules, distributing rules, and handling rule updates or discrepancies.
Who should use this standard
- ITS system developers and integrators
- Road authorities and rule‑making jurisdictions
- Suppliers of digital map providers, AD/ADAS vendors, and telematics platforms
- Policy makers and operators planning digital rule publication, distribution and trust frameworks
Related standards
- ISO/TS 19091 (signalized intersections)
- ISO/TS 14812 and ISO/IEC/IEEE 24765 (additional ITS and terminology references)
- ISO/IEC/IEEE 29148 (systems engineering methodology referenced in the METR framework)
ISO/TS 24315-1:2025 is primarily a vocabulary foundation - essential for achieving interoperable, trustworthy digital traffic regulations across regional and national ITS deployments.