ISO 2575:2021

INTERNATIONAL ISO
STANDARD 2575
Ninth edition
2021-09
Road vehicles — Symbols for controls,
indicators and tell-tales
Véhicules routiers — Symboles pour les commandes, indicateurs et
témoins
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 2
5 Colour . 3
6 Summary table of all symbols . 4
Annex A (normative) Lighting and signalling devices .10
Annex B (normative) Braking system .16
Annex C (normative) Visibility.19
Annex D (normative) Cab environment and comfort .22
Annex E (normative) Maintenance and load functions .28
Annex F (normative) Engine .30
Annex G (normative) Fuel system .35
Annex H (normative) Transmission .37
Annex I (informative) Power drive .40
Annex J (normative) Vehicle handling and cruise control .46
Annex K (normative) Active and passive safety systems .49
Annex L (normative) Security .54
Annex M (normative) Electric functions in general and electric road vehicles .58
Annex N (normative) Information and communication.61
Annex O (normative) Generic vehicle shapes .63
Annex P (normative) Miscellaneous .66
Annex Q (normative) Special signs .67
Annex R (informative) Special symbols and signs .68
Bibliography .70
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 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 39,
Ergonomics.
This ninth edition cancels and replaces the eight edition (ISO 2575:2010), which has been technically
revised. It also incorporates the Amendments ISO 2575:2010/Amd.1:2011, ISO 2575:2010/Amd.3:2014,
ISO 2575:2010/Amd.5:2016, ISO 2575:2010/Amd.6:2017 and ISO 2575:2010/Amd.7:2017.
The main changes compared to the previous edition are as follows:
— a column "Purpose and application of use" including individual descriptions was added to all
symbols;
— Annexes W – X have been moved to Annexes O – R;
— former Annex W (now Annex O) has been adopted to the structure of the other annexes;
— several signs in Annex Q have been deleted due to missing registrations (will be added after their
registration).
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 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 2575:2021(E)
Road vehicles — Symbols for controls, indicators and tell-
tales
IMPORTANT — The electronic file of this document contains colours which are considered to be
useful for the correct understanding of the document. Users should therefore consider printing
this document using a colour printer.
1 Scope
This document specifies symbols (i.e. conventional signs) for use on controls, indicators and tell-tales
applying to passenger cars, light and heavy commercial vehicles and buses, to ensure identification and
facilitate use. This document additionally describes the purpose and application for the symbols.
It also indicates the colours of possible optical tell-tales, which inform the driver of either correct
operation or malfunctioning of the related devices.
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 15008, Road vehicles — Ergonomic aspects of transport information and control systems —
Specifications and test procedures for in-vehicle visual presentation
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
symbol
visually perceptible figure used to transmit information independently of language, produced by
drawing, printing or other means
3.2
tell-tale
display that indicates, by means of a light-emitting device, the actuation of a device, a correct or
defective functioning or condition, or a failure to function
3.3
sign
visually perceptible graphic, generally larger in size than a symbol (3.1), designed for a label, tag or
sticker
3.4
application
modification of symbol (3.1) originals in order to maintain visual clarity and overall consistency
4 General
4.1 The symbols and signs shall be as given in Annexes A to N and Annex P. Additional symbols and
signs are given in Annexes O, Q and R. Minor deviations to the symbols and signs are permitted, provided
they are necessary to reproduce an accurate representation to the driver's line of sight.
NOTE Additional annexes can be included in future editions of this document if necessary.
4.2 In developing the symbols and signs shown in Annex A to Annex R, legibility factors such as line
thickness, gaps between lines, symbol and arrow shapes, etc. were carefully considered. Modifications
that improve legibility are permitted in the circumstances specified in 4.2.1, 4.2.2 and 4.2.3. When
modifying symbol elements, the graphic designer should consult IEC 80416-1, IEC 80416-2, IEC 80416-3,
and IEC 80416-4.
4.2.1 Limitations inherent in some reproduction and display technologies can require increased line
thickness or other minor modifications of symbols. Such modifications are acceptable, provided the
symbol remains unchanged in its basic graphical elements and is easily discernible by the operator.
4.2.2 Additionally, to improve the appearance and perceptibility of a graphical symbol or to coordinate
with the design of the equipment to which it is applied, it can be necessary to change the line thickness
or to round off the corners of the symbol. The graphic designer is normally free to make such changes,
provided that the essential perceptible characteristics of the symbol are maintained.
4.2.3 The graphic designer may render a symbol in either outline or solid form unless this is otherwise
prohibited by the symbol description.
4.3 The shapes of the vehicle, seat and steering wheel shown in this document are not intended to
be restrictive but are the recommended shapes. Modifications to these shapes may be introduced by
designers in order to better represent the true shape of a given element. Except for the aforementioned
shapes, no other symbol elements shall be changed, except as provided in 4.2 or in the specific symbol's
description.
4.4 If a symbol shows a vehicle or parts of a vehicle in a side view, a vehicle moving from right to left in
the symbol area shall be assumed. If a symbol shows a vehicle or parts of a vehicle in a top, plan view, a
vehicle moving from bottom to top in the symbol area shall be assumed.
4.5 For actual use, all symbols shall be reproduced large enough to be easily discernible by the operator.
See IEC 80416-3 for guidelines on the proper sizing of symbols. Symbols shall be used in the orientations
shown in this document unless otherwise noted for individual symbols.
4.6 Symbols on controls and displays shall contrast well with their background. For most controls,
a light symbol on a dark background is preferred. Displays may use either a light symbol on a dark
background or a dark symbol on a light background, depending on which alternative provides the best
visual perception. When a symbol image is reversed (for example black to white and vice versa), it shall
be done for the entire symbol.
4.7 For symbols that are displayed using pixel matrices, the character matrix shall be as stipulated in
ISO 15008.
4.8 Letters and numerals may be used as symbols. For example, the letters P, R, N, D, have the meaning
indicated when used in association with transm
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