ISO 25110:2025

International
Standard
ISO 25110
Second edition
Electronic fee collection — Interface
2025-04
definition for on-board account
using an integrated circuit card (ICC)
Perception de télépéage — Définition d’interface pour compte
embarqué utilisant une carte à circuit(s) intégré(s)
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Data transfer models . 2
5.1 General .2
5.1.1 Overview .2
5.1.2 Transparent type .3
5.1.3 Caching type .4
5.1.4 Buffering type .4
5.2 Symbols .4
5.3 Transparent type — definition .4
5.3.1 General .4
5.3.2 Data transfer process .5
5.4 Caching type — definition .5
5.4.1 General .5
5.4.2 Data transfer process .5
5.5 Buffering type — definition .6
5.5.1 General .6
5.5.2 Data transfer process .6
6 Interface definition for ICC access . 7
6.1 Transparent type .7
6.1.1 Functional configuration .7
6.1.2 Command and response between the RSE and OBE .7
6.2 Caching type .8
6.2.1 Functional configuration .8
6.2.2 Command and response between the RSE and the OBE .8
6.3 Buffering type .9
6.3.1 Functional configuration .9
6.3.2 Command and response between the RSE and the OBE .9
Annex A (informative) On-board account requirements .11
Annex B (informative) Examples of ICC access method . 14
Annex C (informative) Interoperability relation with other sectors .27
Bibliography .29

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This second edition cancels and replaces the first edition (ISO 25110:2017), which has been technically
revised.
The main changes are as follows:
— Clause 3 has been updated and ISO 17573-2 has been made the primary source for terms and definitions;
— in Clause 6, a provision related to the EFC functions invoked by roadside equipment to instruct the
on-board equipment has been changed from a recommendation to a requirement for conformance to
ISO 14906.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
Introduction
0.1  Background and motivation
Two payment systems currently exist for dealing with electronic fee collection (EFC):
1) the central account system, which uses a one-piece on-board unit (OBU), and
2) the on-board account system, which uses a payment media such as the integrated circuit card (ICC)
inserted in an element of on-board equipment (OBE).
ICCs are widely used for public transport cards such as subway and bus payment means, and electronic
money cards are used for general purpose payments, as well as for credit cards and banking cards. In the
future, ICCs are expected to also be used for EFC payment means, providing convenience and flexibility; see
Figure 1.
Figure 1 — Motivation for on-board accounts using ICCs
Currently, relevant descriptions in existing EFC-related standards are focused on the central account system,
which is comparatively simple and gives more feasibility for EFC interoperability than the on-board account
system, which is complex and has more items to be settled.
Figure 2 shows the basic model of EFC, in which the OBE is used as a communication means and the ICC
carries the payment means.
v
Figure 2 — The basic model of EFC
Considering the widespread use of transport cards or electronic money cards, a new International Standard
for an on-board account system using ICCs is required. Furthermore, the rapid development in certain
regions of the use of state-of-the-art mobile phones integrated with ICC functions as a payment means for
public transport or retail shopping (a “mobile electronic purse”), makes standardization on this theme
essential when considering future EFC payment methods.
0.2  Objective and use
The objective of this document is to classify data transfer models based on operational requirements and to
define a specific ICC access interface for on-board accounts using ICCs. Furthermore, this document provides
practical examples of transactions in Annex B, for consideration and easy adoption by toll road operators.
This document provides a common technical platform for on-board accounts using ICCs to deal with various
operational requirements, along with practical examples of on-board accounts used or planned in several
countries.
Each toll road operator can establish their own specification by selecting one example in the models of this
document (like a toolbox) to meet their requirements.
Figure 3 shows the principle of an on-board account architecture and the scope of this document. The
descriptions in this document focus on the interface (I/F) between the RSE and OBE to access the ICC.
Figure 3 — Principle of an on-board account architecture and scope of this document

vi
International Standard ISO 25110:2025(en)
Electronic fee collection — Interface definition for on-board
account using an integrated circuit card (ICC)
1 Scope
This document specifies the data transfer models between roadside equipment (RSE) and integrated circuit
cards (ICCs) and the interface descriptions between the RSE and on-board equipment (OBE) for on-board
accounts using an ICC. It also provides examples of interface definitions and transactions deployed in several
countries.
This document covers:
— data transfer mode
...