ISO/TR 21734-3:2024

FINAL DRAFT
Technical
Report
ISO/DTR 21734-3
ISO/TC 204
Intelligent transport systems —
Secretariat: ANSI
Performance testing for
Voting begins on:
connectivity and safety functions of
2024-04-01
automated driving buses in public
Voting terminates on:
transport —
2024-05-27
Part 3:
Service framework and use cases
Systèmes de transport intelligents — Essais de performance pour
les fonctions de connectivité et de sécurité des bus à conduite
automatisée dans les transports publics —
Partie 3: Cadre de service et cas d'usage
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/DTR 21734-3:2024(en) © ISO 2024

FINAL DRAFT
ISO/DTR 21734-3:2024(en)
Technical
Report
ISO/DTR 21734-3
ISO/TC 204
Intelligent transport systems —
Secretariat: ANSI
Performance testing for
Voting begins on:
connectivity and safety functions of
automated driving buses in public
Voting terminates on:
transport —
Part 3:
Service framework and use cases
Systèmes de transport intelligents — Essais de performance pour
les fonctions de connectivité et de sécurité des bus à conduite
automatisée dans les transports publics —
Partie 3: Cadre de service et cas d'usage
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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 Reference number
ISO/DTR 21734-3:2024(en) © ISO 2024

ii
ISO/DTR 21734-3:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Terms and definitions .1
3.2 Abbreviated terms and symbols.3
4 ADB service framework . 3
4.1 ADB service components .3
4.1.1 General .3
4.1.2 Automated driving bus (ADB) .4
4.1.3 Monitoring and control centre .4
4.1.4 IoT infrastructure.5
4.1.5 Smart bus station .5
4.1.6 ADB passenger.5
4.1.7 Summary .5
4.2 Fare management system .6
4.3 Identification .6
4.4 Security .7
4.4.1 General .7
4.4.2 Public interest .7
4.4.3 Assets to protect .7
4.4.4 General criteria for security .7
5 ADB service and use cases . 8
5.1 Overview .8
5.2 ADB operation service .8
5.2.1 General .8
5.2.2 Use case 1-1: Predefined route type .9
5.2.3 Use case 1-2: on-demand type .11
5.3 Passenger payment handling service . 13
5.3.1 General . 13
5.3.2 Use case 2-1: Prepaid fare system . 15
5.3.3 Use case 2-2: Deferred payment system . .16
5.4 ADB emergency response service .18
5.4.1 General .18
5.4.2 Use case 3-1: Occurrences of accidents and autonomous driving system errors .18
5.4.3 Use case 3-2: Occurrences of in-vehicle emergencies .19
5.5 Transport information provision service . 20
5.5.1 General . 20
5.5.2 Use case 4: Transport information provision service for safe operation of ADBs .21
Annex A (informative) ADB system activities (field test) in the Republic of Korea .24
Bibliography .26

iii
ISO/DTR 21734-3:2024(en)
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/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.
A list of all parts in the ISO 21734 series can be found on the ISO website.
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
ISO/DTR 21734-3:2024(en)
Introduction
Automated vehicle technology has been developing rapidly in recent years as one of the measures for reducing
automobile accidents caused by human errors and for promoting the automobile industry. The automated
driving bus (ADB) is a new type of public transport mode embedded with automated vehicle technologies.
The progress of development and deployment of ADBs has accelerated in recent years, exceeding that of
automated passenger vehicles.
From the connectivity perspective, to ensure its effectiveness as a public transport mode, ADBs need to
connect with:
— traffic signal networks both for vehicles and pedestrians;
— the monitoring and control centre for bus operation; and
— other relevant infrastructure.
In terms of safety, the ADB needs to:
— be embedded with automated vehicle functions to connect with the wireless signal control system; and
— be ready to respond to unexpected situations involving other road users such as pedestrians and
bicyclists.
With secured connectivity and safety, A
...

© ISO #### – All rights reserved
ISO/TRDTR 21734-3:####(X)
ISO /TC 204/WG 8
Secretariat: XXXX ANSI
Date: 2024-03-15
Intelligent Transport Systemstransport systems — Performance
testing for connectivity and safety functions of automated driving
busbuses in public transport— —
Part 3. :
Service framework and use cases

DTR stage
Warning for WDs and CDs
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to
change without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
To help you, this guide on writing standards was produced by the ISO/TMB and is available at
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ISO #####-#:####(X)
A model manuscript of a draft International Standard (known as “The Rice Model”) is available at
https://www.iso.org/iso/model_document-rice_model.pdf

2 © ISO #### – All rights reserved

© ISO #### – All rights reserved
Systèmes de transport intelligents — Essais de performance pour les fonctions de connectivité et de sécurité des
bus à conduite automatisée dans les transports publics —
Partie 3: Cadre de service et cas d'usage

ISO/TR DTR 21734-3:####(X:(en)
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
Fax: +41 22 749 09 47
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
iv © ISO #### 2024 – All rights reserved

iv
ISO/TRDTR 21734-3:####(X:(en)
Contents
Foreword iv
Introduction v
Scope 1
Normative references 1
Terms and definitions 1
3.1 Terms and definitions 1
Abbreviation 3
ADB service framework 4
ADB service components 4
Fare Management System 6
Identification 6
Security 6
ADB Service and Use Cases 7
Overview 7
ADB operation service 8
Passenger Payment Handling Service 15
ADB Emergency Response Service 20
Transport Information Provision Service 24
Annex A (informative) ADB system activities (field test) in Korea 27
Bibliography 32
© ISO #### 2024 – All rights reserved

v
ISO/TR DTR 21734-3:####(X:(en)
Contents
Foreword . viii
Introduction . ix
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Terms and definitions . 1
3.2 Abbreviated terms and symbols . 4
4 ADB service framework . 5
4.1 ADB service components . 5
4.1.1 General. 5
4.1.2 Automated driving bus (ADB) . 6
4.1.3 Monitoring and control centre . 6
4.1.4 IoT infrastructure . 7
4.1.5 Smart bus station . 7
4.1.6 ADB passenger . 7
4.1.7 Summary . 7
4.2 Fare management system. 8
4.3 Identification . 8
4.4 Security . 9
4.4.1 General. 9
4.4.2 Public interest . 9
4.4.3 Assets to protect . 9
4.4.4 General criteria for security . 10
5 ADB service and use cases. 10
5.1 Overview . 10
5.2 ADB operation service . 11
5.2.1 General. 11
5.2.2 Use case 1-1: Predefined route type . 14
5.2.3 Use case 1-2: on-demand type . 17
5.3 Passenger payment handling service . 23
5.3.1 General. 23
5.3.2 Use case 2-1: Prepaid fare system . 26
5.3.3 Use case 2-2: Deferred payment system . 29
5.4 ADB emergency response service . 32
5.4.1 General. 32
5.4.2 Use case 3-1: Occurrences of accidents and autonomous driving system errors . 32
5.4.3 Use case 3-2: Occurrences of in-vehicle emergencies. 33
vi © ISO #### 2024 – All rights reserved

vi
ISO/TRDTR 21734-3:####(X:(en)
5.5 Transport information provision service . 37
5.5.1 General. 37
5.5.2 Use case 4: Transport information provision service for safe operation of ADBs . 38
Annex A (informative) ADB system activities (field test) in the Republic of Korea . 41
Bibliography . 47

© ISO #### 2024 – All rights reserved

vii
ISO/TR DTR 21734-3:####(X:(en)
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 documentsdocument 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).
Attention is drawnISO draws attention to the possibility that some of the elementsimplementation of this
document may beinvolve the subjectuse 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/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. Details of any patent rights identified during the development of
the document will be in the Introduction and/or on the ISO list of patent declarations received (see
www.iso.org/patents).
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, intelligentIntelligent transport systems.
A list of all parts in the ISO 21734 series can be found on the ISO website.
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.
.
viii © ISO #### 2024 – All rights reserved

viii
ISO/TRDTR 21734-3:####(X:(en)
Introduction
Automated vehicle technology has been developing rapidly in recent years as one of the measures for reducing
automobile accidents caused by human errors as well asand for promoting the automobile industry. The
automated driving bus (ADB) is a new type of public transport mode embedded with automated vehicle
technologies. The progress of the development and deployment of the ADBADBs has been accelerated in
recent years that, exceeding the development speedthat of automated passenger vehicles.
From the connectivity perspective, the ADB needsto ensure its effectiveness as a public transport mode, ADBs
need to connect with :
— traffic signal networks both for vehicles and pedestrians, ;
— the monitoring and control centre for bus operation,; and
— other relevant infrastructure to ensure its effectiveness as a public transport mode. .
In terms of safety, the ADB needs to :
— be embedded with automated vehicle functions to connect with the wireless signal control system; and
— be ready to re
...