EN ISO 14906:2023 PDF

Overview

EN ISO 14906:2023 (identical to ISO 14906:2022) defines the application interface for electronic fee collection (EFC) systems that use dedicated short-range communication (DSRC). It specifies the EFC application process interface to the DSRC application layer and defines the information objects, addressing and functional services needed to ensure interoperability between roadside units and in-vehicle or on-board equipment. The standard follows the OSI philosophy (ISO/IEC 7498-1) and is an interface specification rather than an implementation prescription. Security-related data structures and function placeholders are provided, while actual security policies, algorithms and key management remain under the EFC operator’s control.

Key technical topics and requirements

• EFC attributes (application information): standardized data elements that describe vehicle, payment, driver, equipment, receipts and contract information for use across EFC systems and potentially other interfaces.
• Addressing mechanisms: methods for addressing EFC attributes and hardware components (e.g., integrated circuit cards), including Element Identifier (EID) and support for multiple attribute instances.
• EFC functions and service primitives: defined actions (GET/SET, ADD, SUBTRACT, DEBIT, CREDIT, TRANSFER_CHANNEL, COPY, etc.), associated ActionType values, and parameter semantics to qualify services between DSRC application layer and EFC application.
• EFC transaction model: common transaction elements and sequential phases (initialization with BST/VST contents, transaction phase) to ensure consistent processing of tolling events.
• Interface behaviour for interoperability: functional rules and expected interactions to enable multi-vendor and cross-border interoperability of DSRC-based EFC systems.
• Security placeholders and annexes: structures for secure transactions and normative annexes with security calculation examples (DES, AES), data type specifications, and illustrative transaction examples.

Practical applications and who uses this standard

• Tolling and road-pricing operators implementing DSRC-based systems
• ITS integrators and system architects designing EFC middleware and back-office interfaces
• On-board unit (OBU) and roadside equipment manufacturers ensuring compatibility
• Payment service providers and card/secure element suppliers for interface conformance
• Test laboratories and certification bodies verifying EFC-DSRC interoperability
• Transport authorities and standards bodies harmonizing cross-border tolling

Using EN ISO 14906:2023 helps reduce integration risk, simplify supplier interoperability, and support secure, standard-based EFC deployments.

Related standards

• ISO 14906:2022 (international text endorsed by CEN as EN ISO 14906:2023)
• ISO/IEC 7498-1 (OSI reference model) - referenced for interface philosophy

Keywords: EN ISO 14906:2023, electronic fee collection, EFC, DSRC, application interface, ISO 14906:2022, transaction model, interoperability, tolling standards.