ISO/TS 19206-9:2025

Road vehicles — Test devices for target vehicles, vulnerable road users and other objects, for assessment of active safety functions — Part 9: Requirements for small child targets

This document specifies performance requirements for surrogate small child targets (SCT) used to assess the system detection and activation performance of active safety systems and automated driving systems (ADS). This document specifies the properties of targets that represent two small children in terms of size, shape, reflection properties, etc. for testing purposes. The two targets represent a 9- to 12-month-old infant and a two-year-old toddler. This document addresses the detection requirements for the targets in terms of sensing technologies commonly in use at the time of publication, and where possible, anticipated future sensing technologies. It also addresses methodologies to verify the target response properties to these sensors. This document does not address the test procedures in terms of speed, position, or timing of events. Performance criteria for the active safety system being evaluated are also not addressed. NOTE Related test procedures using small child targets according to this document can be found in ISO 4273 and ISO 23374-1.

Véhicules routiers — Dispositifs d'essai pour véhicules cibles, usagers de la route vulnérables et autres objets, pour l'évaluation de fonctions de sécurité active — Partie 9: Exigences pour cibles de petits enfants

General Information

• Status: Published
• Publication Date: 25-Aug-2025
• ICS: 43.020 - Road vehicles in general
• Technical Committee: ISO/TC 22/SC 33 - Vehicle dynamics and chassis components
• Drafting Committee: ISO/TC 22/SC 33 - Vehicle dynamics and chassis components
• Current Stage: 6060 - International Standard published
• Start Date: 26-Aug-2025
• Due Date: 15-Sep-2025
• Completion Date: 26-Aug-2025

Standards Content (Sample)

Technical
Specification
ISO/TS 19206-9
First edition
Road vehicles — Test devices
2025-08
for target vehicles, vulnerable
road users and other objects,
for assessment of active safety
functions —
Part 9:
Requirements for small child targets
Véhicules routiers — Dispositifs d'essai pour véhicules cibles,
usagers de la route vulnérables et autres objets, pour l'évaluation
de fonctions de sécurité active —
Partie 9: Exigences pour cibles de petits enfants
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: [phone]
Email: [e-mail]
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 Symbols and abbreviated terms. 2
5 Small child target specifications . 2
5.1 General .2
5.2 Infant target dimensions .3
5.3 Toddler target dimensions .3
5.4 Postures .3
5.5 Repairability .3
5.6 Environmental conditions .3
6 Small child target response to sensing technologies . 3
6.1 General .3
6.2 Optical requirements .4
6.2.1 General .4
6.2.2 Visual requirements .4
6.2.3 Near infrared (NIR) requirements .4
6.2.4 Reference measurements .4
6.3 Radar requirements .4
6.3.1 General .4
6.3.2 Reference measurements .4
6.3.3 Radar cross section (RCS) measurement of small child target .4
6.4 Ultrasonic (US) requirements .5
6.4.1 General .5
6.4.2 Reference measurements .5
6.4.3 Ultrasonic cross section (UCS) boundaries of the SCT .5
6.4.4 Verification of UCS boundaries .5
6.5 Calibration and verification .5
7 Functional requirements for small child target . 5
Annex A (normative) Small child target dimensions and postures . 7
Annex B (normative) Measurement of ultrasonic (US) properties .10
Annex C (normative) Small child target RCS properties .20
Bibliography .28

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 documents 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 22, Road vehicles, Subcommittee SC 33, Vehicle
dynamics, chassis components and driving automation systems testing.
A list of all parts in the ISO 19206 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
Introduction
Advanced driver assistance systems (ADAS) and active safety systems are designed to support decision-
making for the driver, extend the driver’s awareness of the traffic situation with advanced warnings,
improve the behaviour of the vehicle, and even take over vehicle control in an emergency situation. The goal
is to completely avoid an accident or at least reduce the severity of an accident.
The ISO 19206 series addresses the specification of test target objects for traffic scenarios representing
vehicles, vulnerable road users and other objects in the path of the subject vehicle. This document addresses
the specification of test targets for small children as a supplement to ISO 19206-2, where targets for an adult
and a seven-year-old child are specified.
Small child test targets (SCT) represent two different sizes for testing of different functions to evaluate their
performance. Current test procedures only address stationary SCT, and consequently this document only
addresses the stationary SCT without movement by a target carrier.
The SCT described in this document series can be used for system development or applied in conjunction
with existing standards, or standards under development, for assessment of active safety systems and
automated driving systems (ADS).

v
Technical Specification ISO/TS 19206-9:2025(en)
Road vehicles — Test devices for target vehicles, vulnerable
road users and other objects, for assessment of active safety
functions —
Part 9:
Requirements for small child targets
1 Scope
This document specifies performance requirements for surrogate small child targets (SCT) used to assess
the system detection and activation performance of active safety systems and automated driving systems
(ADS). This document specifies the properties of targets that represent two small children in terms of size,
shape, reflection properties, etc. for testing purposes. The two targets represent a 9- to 12-month-old infant
and a two-year-old toddler.
This document addresses the detection requirements for the targets in terms of sensing technologies
commonly in use at the time of publication, and where possible, anticipated future sensing technologies. It
also addresses methodologies to verify the target response properties to these sensors.
This document does not address the test procedures in terms of speed, position, or timing of events.
Performance criteria for the active safety system being evaluated are also not addressed.
NOTE Related test procedures using small child targets according to this document can be found in ISO 4273 and
ISO 23374-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 8855, Road vehicles — Vehicle dynamics and road-holding ability — Vocabulary
ISO 17386, Intelligent transport systems — Manoeuvring aids for low-speed operation (MALSO) — Performance
requirements and test procedures
ISO 19206-2, Road vehicles — Test devices for target vehicles, vulnerable road users and other objects, for
assessment of active safety functions — Part 2: Requirements for pedestrian targets
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8855 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https:// www .electropedia .org/
— ISO Online browsing platform: available at https:// w
...

FINAL DRAFT
Technical
Specification
ISO/DTS 19206-9
ISO/TC 22/SC 33
Road vehicles — Test devices
Secretariat: DIN
for target vehicles, vulnerable
Voting begins on:
road users and other objects,
2025-05-09
for assessment of active safety
Voting terminates on:
functions —
2025-07-04
Part 9:
Requirements for small child
targets
Véhicules routiers — Dispositifs d'essai pour véhicules cibles,
usagers de la route vulnérables et autres objets, pour l'évaluation
de fonctions de sécurité active —
Partie 9: Exigences pour cibles de petits enfants
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/DTS 19206-9:2025(en) © ISO 2025

FINAL DRAFT
ISO/DTS 19206-9:2025(en)
Technical
Specification
ISO/DTS 19206-9
ISO/TC 22/SC 33
Road vehicles — Test devices
Secretariat: DIN
for target vehicles, vulnerable
Voting begins on:
road users and other objects,
for assessment of active safety
Voting terminates on:
functions —
Part 9:
Requirements for small child targets
Véhicules routiers — Dispositifs d'essai pour véhicules cibles,
usagers de la route vulnérables et autres objets, pour l'évaluation
de fonctions de sécurité active —
Partie 9: Exigences pour cibles de petits enfants
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 2025
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DTS 19206-9:2025(en) © ISO 2025

ii
ISO/DTS 19206-9:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 2
5 Small child target specifications . 2
5.1 General .2
5.2 Infant target dimensions .3
5.3 Toddler target dimensions .3
5.4 Postures .3
5.5 Repairability .3
5.6 Environmental conditions .3
6 Small child target response to sensing technologies . 3
6.1 General .3
6.2 Optical requirements .4
6.2.1 General .4
6.2.2 Visual requirements .4
6.2.3 Near infrared (NIR) requirements .4
6.2.4 Reference measurements .4
6.3 Radar requirements .4
6.3.1 General .4
6.3.2 Reference measurements .4
6.3.3 Radar cross section (RCS) measurement of small child target .4
6.4 Ultrasonic (US) requirements .5
6.4.1 General .5
6.4.2 Reference measurements .5
6.4.3 Ultrasonic cross section (UCS) boundaries of the SCT .5
6.4.4 Verification of UCS boundaries .5
6.5 Calibration and verification .5
7 Functional requirements for small child target . 5
Annex A (normative) Small child target dimensions and postures . 7
Annex B (normative) Measurement of ultrasonic (US) properties .10
Annex C (normative) Small child target RCS properties . 19
Bibliography .27

iii
ISO/DTS 19206-9:2025(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 documents 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 22, Road vehicles, Subcommittee SC 33, Vehicle
dynamics, chassis components and driving automation systems testing.
A list of all parts in the ISO 19206 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/DTS 19206-9:2025(en)
Introduction
Advanced driver assistance systems (ADAS) and active safety systems are designed to support decision-
making for the driver, extend the driver’s awareness of the traffic situation with advanced warnings,
improve the behaviour of the vehicle, and even take over vehicle control in an emergency situation. The goal
is to completely avoid an accident or at least reduce the severity of an accident.
The ISO 19206 series addresses the specification of test target objects for traffic scenarios representing
vehicles, vulnerable road users and other objects in the path of the subject vehicle. This document addresses
the specification of test targets for small children as a supplement to ISO 19206-2, where targets for an adult
and a seven-year-old child are specified.
Small child test targets (SCT) represent two different sizes for testing of different functions to evaluate their
performance. Current test procedures only address stationary SCT, and consequently this document only
addresses the stationary SCT without movement by a target carrier.
The SCT described in this document series can be used for system development or applied in conjunction
with existing standards, or standards under development, for assessment of active safety systems and
automated driving systems (ADS).

v
FINAL DRAFT Technical Specification ISO/DTS 19206-9:2025(en)
Road vehicles — Test devices for target vehicles, vulnerable
road users and other objects, for assessment of active safety
functions —
Part 9:
Requirements for small child targets
1 Scope
This document specifies performance requirements for surrogate small child targets (SCT) used to assess
the system detection and activation performance of active safety systems and automated driving systems
(ADS). This document specifies the properties of targets that represent two small children in terms of size,
shape, reflection properties, etc. for testing purposes. The two targets represent a 9- to 12-month-old infant
and a two-year-old toddler.
This document addresses the detection requirements for
...

ISO/DTS 19206-9
ISO/TC22/SC33/WG16TC 22/SC 33
Date: 2025-01-31
Secretariat: SIS DIN
Date: 2025-04-25
Road vehicles — Test devices for target vehicles, vulnerable road
users and other objects, for assessment of active safety functions —
Part 9: Requirements for small child targets —
Part 9:
Requirements for small child targets
Véhicules routiers — Dispositifs d'essai pour véhicules cibles, usagers de la route vulnérables et autres objets,
pour l'évaluation de fonctions de sécurité active — Partie 9: Exigences pour cibles d'enfants —

DTS 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.

Partie 9: Exigences pour cibles de petits enfants
ISO/DTS 19206-9:(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
EmailE-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO 2025 – All rights reserved
ii
ISO/DTS 19206-9:(en)
Contents
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
5 Small child target specifications . 2
5.1 General . 2
5.2 Infant target dimensions . 3
5.3 Toddler target dimensions . 3
5.4 Postures . 3
5.5 Repairability . 3
5.6 Environmental conditions . 3
6 Small child target response to sensing technologies . 3
6.1 General . 3
6.2 Optical requirements . 4
6.3 Radar requirements . 4
6.4 Ultrasonic (US) requirements . 5
6.5 Calibration and verification . 6
7 Functional requirements for small child target . 6
Annex A (normative) Small child target dimensions and postures . 7
Annex B (normative) Measurement of ultrasonic (US) properties . 12
Annex C (normative) Small child target RCS properties . 25
Bibliography . 38

Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
5 Small child target specifications . 2
5.1 General . 2
5.2 Infant target dimensions . 2
5.3 Toddler target dimensions . 3
5.4 Postures . 3
5.5 Repairability . 3
5.6 Environmental conditions . 3
6 Small child target response to sensing technologies . 3
6.1 General . 3
6.2 Optical requirements . 3
6.2.1 General . 3
© ISO 2025 – All rights reserved
iii
ISO/DTS 19206-9:(en)
6.2.2 Visual requirements . 3
6.2.3 Near Infrared (NIR) requirements . 4
6.2.4 Reference measurements . 4
6.3 Radar requirements . 4
6.3.1 General . 4
6.3.2 Reference measurements . 4
6.3.3 Radar cross section measurement of small child target . 4
6.4 Ultra-sonic requirements . 4
6.4.1 General . 4
6.4.2 Reference measurements . 4
6.4.3 UCS boundaries of the SCT . 4
6.4.4 Verification of UCS boundaries . 5
6.5 Calibration and verification . 5
7 Functional requirements for small child target . 5
Annex A (normative) Small child target dimensions and postures . 6
Annex B (normative) Measurement of ultrasonic (US) properties . 10
Annex C (normative) Small child target RCS properties . 19

iv © ISO 2025 – All rights reserved
iv
ISO/DTS 19206-9:(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 documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directiveswww.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.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.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 33, Vehicle
dynamics and, chassis components, Working Group WG 16, Active safety test equipment and driving automation
systems testing.
A list of all parts in the ISO 19206 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.htmlwww.iso.org/members.html.
© ISO 2025 – All rights reserved
v
ISO/DTS 19206-9:(en)
Introduction
ADAS (Advanced Driver Assistance Systemsdriver assistance systems (ADAS) and Active Safetyactive safety
systems are designed to support decision-making for the driver, extend the driver’s awareness of the traffic
situation with advanced warnings, improve the behaviour of the vehicle, and even take over vehicle control in
an emergency situation. The goal is to completely avoid an accident or at least reduce the severity of an
accident.
The ISO 19206 series addresses the specification of test target objects for traffic scenarios representing
vehicles, vulnerable road users and other objects in the path of the subject vehicle. This document addresses
the specification of test targets for small children as a supplement to ISO 19206-2, where targets for an adult
and a seven-year-old child are specified.
Small child test targets (SCT) represent two different sizes for testing of different functions to evaluate their
performance. Current test procedures only address stationary SCT, an
...