Overview
EN ISO 17573-2:2025 - Electronic fee collection (EFC) - System architecture for vehicle-related tolling - Part 2: Vocabulary is the official vocabulary for the EFC domain. Published by CEN and identical to ISO 17573-2:2025, this document compiles and standardizes terms and definitions used across standards and specifications for electronic fee collection and road‑user charging. It is intended as the primary reference for consistent terminology in EFC documentation, design, procurement and regulation.
Key topics and requirements
The standard focuses on terminology and does not prescribe technical system architectures or protocols. Key technical topics covered (as terms and definitions) include:
- Charging metrics and errors: e.g., absolute charging error, average relative charging error, accepted charging error interval.
- Identity, security and trust: e.g., access credentials, attestation, authentication, certificate revocation list.
- System components and functions: e.g., back end, front end, charge object, charge object detector.
- Detection and identification technologies: e.g., automated number plate recognition (ANPR).
- System variants and concepts: e.g., autonomous EFC system (on‑board data collection independent of roadside equipment).
- Conformity and assurance terms: e.g., certification, accreditation, assurance requirement.
The document follows ISO terminology guidelines (ISO 704, ISO 1087) and has no normative references. It updates and converts the previous technical specification (ISO/TS 17573-2:2020) into an international standard and adds new terms (for example, mode of transport, true positive/negative events).
Applications
This vocabulary enables:
- Consistent use of terms in technical standards, specifications and contracts for tolling systems.
- Clear requirements in procurement documents and interoperability agreements.
- Harmonized reporting, testing and acceptance criteria for toll operators and solution providers.
- Improved communication between stakeholders (transport authorities, system integrators, ITS teams, accreditation bodies).
By using a common vocabulary, organizations reduce ambiguity in system design, legal texts and operational procedures - supporting interoperability and regulatory compliance.
Who should use this standard
- Standards editors and technical writers developing EFC or ITS documents
- Toll operators and road authorities specifying systems and SLAs
- System integrators, vendors and software developers for tolling solutions
- Test laboratories, conformity assessment and accreditation bodies
- Researchers, consultants and policy makers working on road‑user charging
Related standards
Keywords: electronic fee collection, EFC vocabulary, EN ISO 17573-2:2025, system architecture, vehicle related tolling, tolling terminology, ANPR, charging error, authentication.
