Overview
ISO 25110:2017 - Electronic fee collection - Interface definition for on-board account using integrated circuit card (ICC) - specifies how roadside equipment (RSE) and on-board equipment (OBE) access and exchange payment data with an integrated circuit card (ICC) for on‑board accounts. The standard classifies data transfer models, defines interface descriptions between RSE and OBE, and provides example transactions and interface definitions used in several countries. It focuses on the mid‑layer application interfaces; physical and lower‑level protocol details (e.g., DSRC L1/L2, ICC OS internals) are outside its scope.
Key technical topics and requirements
- Data transfer models: Defines three operational models - transparent, caching, and buffering - each describing how RSE ↔ ICC data is transferred and managed in the OBE.
- Transparent type: direct pass‑through of commands/APDUs.
- Caching type: RSE commands are transformed and cached (Bridge‑2 behavior).
- Buffering type: intermediate buffering within the OBE (Bridge‑1 behavior applies to some models).
- Interface definitions: Specifies the application‑layer interface between RSE and OBE to access the ICC, including:
- Functional configurations for each model.
- RSE command definitions for ICC access and expected responses.
- Data formats and data element definitions used by RSE commands.
- Security & access control concepts: Introduces terms such as access credentials, authenticators, and secure application modules (SAM) relevant to secure ICC access (standard defines terminology; specific cryptographic implementations are outside scope).
- Examples and practical guidance: Annexes include on‑board account requirements (Annex A), examples of ICC access methods and transactions (Annex B), and interoperability relations with other sectors (Annex C).
- Normative references: Aligns with related ITS and DSRC application standards (e.g., ISO 14906, ISO 15628).
Practical applications
- Design and implementation of tolling systems that use ICCs (smart cards or mobile wallets with ICC functions) as on‑board payment media.
- Interfacing RSE/OBE vendors implementing application‑layer command sets to access payment media securely.
- System architects and integrators selecting an appropriate data transfer model (transparent/caching/buffering) to match operational needs (e.g., online clearing, offline account updates, intermittent connectivity).
- Drafting procurement specs and interoperability profiles for multi‑vendor tolling and electronic fee collection (EFC) deployments.
Who should use this standard
- Toll road operators and service providers planning ICC‑based on‑board accounts
- OBE and RSE manufacturers and firmware developers
- Card issuers, payment scheme architects, and security/SAM integrators
- ITS architects, system integrators, and standards bodies defining interoperability profiles
Related standards (applicable)
- ISO 14906 - EFC application interface definition for DSRC
- ISO 15628 - DSRC application layer
These address DSRC and lower‑level layers; ISO 25110 complements them by focusing on the RSE↔OBE↔ICC application interface for on‑board accounts.
Keywords: ISO 25110, electronic fee collection, ICC, on‑board account, RSE, OBE, DSRC, APDU, tolling, interoperability.