ISO/DIS 23456-1

Dynamic signs in physical environments

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DRAFT INTERNATIONAL STANDARD
ISO/DIS 23456-1
ISO/TC 159/SC 5 Secretariat: BSI
Voting begins on: Voting terminates on:
2020-09-11 2020-12-04
Dynamic signs in physical environments —
Part 1:
General requirements
ICS: 01.080.10
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ISO/DIS 23456-1:2020(E)
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ISO/DIS 23456-1:2020(E)
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ISO/DIS 23456-1:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Dynamic signs .......................................................................................................................................................................................................... 2

5 Visibility ........................................................................................................................................................................................................................ 3

5.1 General ........................................................................................................................................................................................................... 3

5.2 Graphical symbols and pictorial symbols to be displayed ................................................................................ 4

5.3 Characters to be displayed ............................................................................................................................................................ 4

5.3.1 Font style ................................................................................................................................................................................ 4

5.3.2 Font Size .................................................................................................................................................................................. 4

5.3.3 Context of presentation ........................................................................................................................................... ... 4

5.3.4 Number of characters .................................................................................................................................................. 4

5.4 Types and requirements for dynamic display methods ...................................................................................... 4

5.4.1 Types of dynamic presentation incorporating movement .......................................................... 4

5.4.2 Types of temporal variation in brightness, chromaticity or shape ...................................... 4

5.5 Visual requirements for dynamic signs to be considered .................................................................................. 4

5.5.1 Information volume ...................................................................................................................................................... 4

5.5.2 Size ............................................................................................................................................................................................... 5

5.5.3 Colour ........................................................................................................................................................................................ 5

5.5.4 Contrast and luminance ............................................................................................................................................. 5

5.5.5 Lead time, presentation time and velocity ................................................................................................ 5

5.5.6 Display location................................................................................................................................................................. 5

5.5.7 Discomfort and annoyance from signs ......................................................................................................... 5

5.5.8 Requirements for combination with characters .................. ................................................................. 5

6 Visual image safety ............................................................................................................................................................................................. 5

6.1 Considerations for avoiding induction of photosensitive seizures ............................................................ 5

6.2 Considerations for avoiding visually induced motion sickness .................................................................... 5

6.3 Considerations for avoiding visually induced balance disorder .................................................................. 6

6.4 Considerations for restricting misuse ................................................................................................................................. 6

7 Accessibility ............................................................................................................................................................................................................... 6

7.1 Consideration of diverse users and diverse context of use............................................................................... 6

7.2 Use of multiple languages .............................................................................................................................................................. 6

Annex A (informative) Possible applications of dynamic signs ................................................................................................ 7

Bibliography .............................................................................................................................................................................................................................10

© ISO 2020 – All rights reserved iii
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ISO/DIS 23456-1:2020(E)
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).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. 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 on 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

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URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee [or Project Committee] ISO/TC [or ISO/PC] ###,

[name of committee], Subcommittee SC ##, [name of subcommittee].
The main changes compared to the previous edition are as follows:
— xxx xxxxxxx xxx xxxx
A list of all parts in the ISO ##### series can be found on the ISO website.
iv © ISO 2020 – All rights reserved
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ISO/DIS 23456-1:2020(E)
Introduction

Dynamic signs, which are providing the information with changing spatially and temporally images,

are a technology that is expected to be used for delivering warnings to improve safety in road traffic

environments, in public building, in outdoor spaces, and in factories, and for providing prompt and

reliable guidance directions for enhanced convenience in those situations, though for the static displays

ISO 7010 Graphical symbols -- Safety colours and safety signs (Foundation for Promoting Personal

Mobility and Ecological Transportation: Eco-Mo Foundation) specifies the adequate size depending on

the viewing distance. Currently most information indicating specific locations and directions within a

space depends on static signs, and the dynamic sign is already being developed in multiple countries,

and some practical applications have already been realized.

Though, the significance, necessity and feasibility of dynamic signs have been recognized, there

are currently no international standards that describe the ergonomic requirements that should be

understood by both device manufacturers and content creators. In order to enable this new technology

of dynamic signs to spread through the marketplace quickly and appropriately, it is important to

avoid=increasing of design that does not take into account the ergonomics characteristics of the

information recipient. Accordingly, the ergonomics principles for the application of dynamic signs are

described in this general guidance.

This document describes a common set of general requirements for future developments of individual

standards, in which numerical criteria of requirements are set depending on individual target

environment. The future individual standards constitute those subseries of this document, as the

umbrella structure.
© ISO 2020 – All rights reserved v
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DRAFT INTERNATIONAL STANDARD ISO/DIS 23456-1:2020(E)
Dynamic signs in physical environments —
Part 1:
General requirements
1 Scope

This document describes general guidance for ergonomics requirements in relation to dynamic signs,

a responsive information presentation technology that changes in accordance with environmental

conditions (e.g. for example, the environmental illumination, the density of people) where the dynamic

signs are presented, and does not cover static signs.
Dynamic signs are presented adaptively to those environmental conditions.

The general guidance for dynamic signs consists of 1) visibility, 2) visual image safety and 3)

accessibility. The first item 1) is further subdivided into conspicuity, distinctiveness, legibility and

comprehensibility. The requirements and recommendations for each are also described.

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 3864-1, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety

signs and safety markings

ISO 3864-4, Graphical symbols — Safety colours and safety signs — Part 4: Colorimetric and photometric

properties of safety sign materials
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
dynamic sign

the sign which changes either position, size, colour, brightness, and contents (combination of these

properties should be considered in terms of the visibility) for warning and guidance by flashing and/or

motion depending upon the environmental conditions

Note 1 to entry: Then ‘dynamic’ has two meanings; 1) changing itself is meaningful to maintain the visibility

and 2) the changing contents to convey the information adaptively is meaningful. Users of this document shall

distinguish these two aspects.

Note 2 to entry: Possible applications of dynamic signs are shown in Annex A and B .

3.2
static sign

information display whose position, size, duration, visual attribution (ex. colour, luminance, shape) and

meaning don’t vary temporally or spatially
3.3
visibility
extent to which visual display can be accepted easily and accurately
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ISO/DIS 23456-1:2020(E)
3.4
conspicuity

extent to which the sign indicates the presence by attracting the attention visually

3.5
...