Overview
CEN ISO/TR 24315-2:2025 sets forth operational concepts for the management of electronic traffic regulations (METR) within intelligent transport systems (ITS). This technical report supports the trustworthy digitalization, dissemination, and management of machine-interpretable traffic and transport-related rules. By providing a standard framework for expressing and distributing road network regulations electronically, METR enhances interoperability, transparency, and safety for all surface transportation stakeholders.
This document follows the format defined by ISO/IEC/IEEE 29148 for concepts of operation (ConOps) and is intended to guide developers, transport authorities, infrastructure operators, and technology vendors in the effective design and operation of METR-compliant systems.
Key Topics
- Electronic Traffic Regulations: Establishes the foundational concepts for the electronic representation and secure distribution of transport rules, including legal traffic instructions, weight and height restrictions, curb management, and more.
- Operational Concepts (ConOps): Outlines the system’s purpose, modes of operation (normal, degraded, fallback), information flows, and key stakeholders. The ConOps approach clarifies what METR systems do, who benefits, and why the system is structured as specified.
- Stakeholder Guidance: Details the roles of transport users, infrastructure operators, rule-makers, enforcement personnel, manufacturers, technologists, and advocacy groups within the METR ecosystem.
- Distribution Mechanisms: Explains how electronic rules can be pre-announced or emergent, distributed via wide-area (pull) or local (push) methods, and consumed by vehicles, infrastructure, or portable devices.
- Framework and Adaptation: Emphasizes the flexibility of the METR framework to support regional needs, cross-border interoperability, and adaptation for future transport developments, such as automated driving systems.
Applications
Adoption of CEN ISO/TR 24315-2:2025 brings practical benefits for a wide range of intelligent transport system applications:
- Automated and Connected Vehicles: Vehicle manufacturers and automated driving system developers can access authoritative electronic rules, supporting safe and lawful operation at all levels of automation.
- Traffic Management Centers: Authorities can manage, disseminate, and update transport rules dynamically, facilitating real-time traffic optimization and supporting enforcement.
- Mapping and Navigation Providers: METR-compliant data feeds enable providers to supply users with up-to-date route guidance incorporating current traffic regulations.
- Public Transport and Logistics: Fleet managers and public mobility operators can tailor operations to current road network rules, improving compliance and efficiency.
- Infrastructure Operators: Helps in coordinating road works, emergency situations, and managing dynamic regulations such as temporary restrictions, improving road safety and service continuity.
- Policy Makers and Enforcement Agencies: Ensures that digital rules are trustworthy, authentic, and machine-readable, increasing regulatory transparency and auditability.
- Interoperability: Supports integration with national and regional systems, such as National Access Points (NAPs), and enables the use of existing data formats (e.g., TN-ITS, DATEX-II, TPEG2) where compatible.
Related Standards
Organizations implementing METR should consider the following related standards:
- ISO/TS 24315-1: Intelligent transport systems - Management of electronic traffic regulations (METR) - Vocabulary
- ISO/IEC/IEEE 29148: Systems and software engineering - Life cycle processes - Requirements engineering
- ISO/TS 14812: Intelligent transport systems - Vocabulary
- ISO/IEC/IEEE 24765: Systems and software engineering - Vocabulary
Additional relevance arises from interoperability with data exchange standards such as DATEX-II, TN-ITS, TPEG2, and frameworks for national access points, as well as regional adaptations for legal and operational requirements.
By adopting CEN ISO/TR 24315-2:2025, stakeholders in intelligent transport systems can accelerate the digital transformation of road regulations, fostering safer, smarter, and more reliable mobility solutions through standardized electronic traffic rule management.