Overview
ISO/TR 24315-2:2025 - Intelligent transport systems - Management of electronic traffic regulations (METR) - Part 2: Operational concepts (ConOps) describes the operational concept for delivering trustworthy, authoritative, machine‑interpretable transport rules for road network use. The Technical Report defines the ConOps in a format consistent with ISO/IEC/IEEE 29148, focusing on how METR systems operate, interact with stakeholders, and support the lifecycle of electronic traffic regulations.
Keywords: ISO/TR 24315-2:2025, METR, Intelligent Transport Systems, operational concept, ConOps, electronic traffic regulations, machine-interpretable rules.
Key topics and technical focus
The document structures the METR operational concept around standard ConOps elements; key topics include:
- Scope, background and objectives - rationale for METR and intended domain of application.
- Operational policies and constraints - governance, policy drivers and implementation limits.
- Current system description - terminators (external actors), processes, data flows, stakeholder roles and data details.
- Justification and user needs - trustworthiness, rule‑maker, third‑party auditing, and other user requirements.
- Proposed system concepts - overview, terminators, processes, and detailed data flows for METR operation.
- Modes of operation - normal, degraded, and fallback modes and associated behavioral expectations.
- User classes and personnel - users subject to rules, entities that establish rules, and third parties.
- Support environment and services - rule discovery, service registration/discovery, security, technology services, METR certification, maintenance and enforcement.
- Impact analysis - operational, organizational and development impacts; benefits and limitations.
- Annexes and scenarios - operational scenarios, data flow diagram conventions, and tentative METR information categories.
The ConOps emphasizes data flows, processes, and stakeholder interactions without prescribing implementation technologies.
Practical applications and intended users
ISO/TR 24315-2:2025 is intended for organizations designing, deploying or using METR systems:
- Transport authorities and rule‑making bodies defining authoritative electronic traffic regulations.
- ITS integrators and system architects creating infrastructure and services for machine‑interpretable rules.
- Automotive OEMs, navigation and mobility service providers that consume METR data for route guidance and automated driving features.
- Enforcement, certification and auditing bodies that evaluate trustworthiness and compliance.
- Researchers and policy makers analyzing operational scenarios and impacts.
Use cases include publishing consistent machine-readable traffic rules, service discovery for rules, certifying METR sources, and supporting automated compliance and route planning.
Related standards
- ISO/IEC/IEEE 29148 - systems and software engineering - life cycle processes - requirements engineering (ConOps format reference).
- Other ITS and data‑exchange standards may be relevant when implementing METR (see bibliography and normative references within the TR).