ISO 12855:2022

Overview

ISO 12855:2022 - Electronic fee collection - Information exchange between service provision and toll charging - defines standardized back-office interfaces and data models for vehicle-related toll services. The standard specifies how toll service providers (TSPs) and toll chargers (TCs) exchange charging-related, administrative and confirmation data (for example, toll declarations, billing details and payment settlement messages). It is technology-agnostic and applicable to any vehicle-related toll regime and charging technology, promoting interoperability across toll domains.

Key topics and technical requirements

• Back‑office information exchange: Interfaces between EFC (electronic fee collection) back-office systems for road user charging, parking and access control.
• Data syntax and semantics: Formal data type definitions and element semantics; normative data types for ADUs (Application Data Units) and APDUs (Application Protocol Data Units).
• ASN.1 data definitions: Data types and coding in Annex A use Abstract Syntax Notation One (ASN.1) in accordance with ISO/IEC 8824‑1.
• Basic protocol mechanisms: Specification of fundamental protocol patterns and ADU structures over which implementers can build transactions.
• Transfer mechanisms and supporting functions: Guidance on secure channels, authenticators, signatures/hashes and key encryption (supporting functions described without mandating specific transport protocols).
• Functional ADUs: Standardized message types for trust objects, EFC context data, contract issuer lists, exception lists, toll declarations, billing details, payment claims/announcements and user complaint handling.
• Scope exclusions (important): ISO 12855:2022 does NOT specify communication outside the TC/TSP back‑office pair, public-transport EFC interfaces, payment processes or fiscal/legal accounting workflows, nor does it mandate service communication channels or full multi-step transaction flows.

Practical applications - who uses it

• Toll operators and toll chargers (TCs) seeking interoperable billing and enforcement data exchange.
• Toll service providers (TSPs) and mobility platform vendors implementing cross-domain charging and contract management.
• System integrators, ITS software developers and solution architects building back‑office EFC systems.
• Regulators and procurement authorities defining interoperability requirements for national or cross-border toll environments.

Related standards and implementation notes

• Aligned with ISO 17573‑1 (EFC architecture) and uses ISO/IEC 10746‑3 concepts for system description.
• ASN.1 definitions aligned with ISO 14906; common EFC data types moved to ISO/TS 17573‑3.
• Use ISO 12855:2022 to ensure semantic consistency of toll declarations and billing details while combining it with domain-specific transport and payment standards for end-to-end solutions.

Keywords: ISO 12855:2022, electronic fee collection, EFC, toll charging, toll declarations, billing details, ASN.1, APDU, ADU, interoperability.