EN ISO 14823-1:2024

SLOVENSKI STANDARD
01-julij-2024
Nadomešča:
SIST EN ISO 14823:2017
Inteligentni transportni sistemi - Seznam grafičnih simbolov - 1. del: Specifikacija
(ISO 14823-1:2024)
Intelligent transport systems - Graphic data dictionary - Part 1: Specification (ISO 14823-
1:2024)
Intelligente Verkehrssysteme - Graphisches Verzeichnis - Teil 1: Spezifikation (ISO
14823-1:2024)
Systèmes de transport intelligents - Dictionnaire de données graphiques - Partie 1:
Spécification (ISO 14823-1:2024)
Ta slovenski standard je istoveten z: EN ISO 14823-1:2024
ICS:
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
43.040.15 Avtomobilska informatika. Car informatics. On board
Vgrajeni računalniški sistemi computer systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 14823-1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2024
EUROPÄISCHE NORM
ICS 35.240.60; 43.040.15 Supersedes EN ISO 14823:2017
English Version
Intelligent transport systems - Graphic data dictionary -
Part 1: Specification (ISO 14823-1:2024)
Systèmes de transport intelligents - Dictionnaire de Intelligente Verkehrssysteme - Graphisches
données graphiques - Partie 1: Spécification (ISO Verzeichnis - Teil 1: Spezifikation (ISO 14823-1:2024)
14823-1:2024)
This European Standard was approved by CEN on 7 March 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14823-1:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 14823-1:2024) has been prepared by Technical Committee ISO/TC 204
"Intelligent transport systems" in collaboration with Technical Committee CEN/TC 278 “Intelligent
transport systems” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2024, and conflicting national standards
shall be withdrawn at the latest by November 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 14823:2017.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 14823-1:2024 has been approved by CEN as EN ISO 14823-1:2024 without any
modification.
International
Standard
ISO 14823-1
First
Intelligent transport systems —
edition
Graphic data dictionary —
2024-05
Part 1:
Specification
Systèmes de transport intelligents — Dictionnaire de données
graphiques —
Partie 1: Spécification
Reference number
ISO 14823-1:2024(en) © ISO 2024

ISO 14823-1:2024(en)
© ISO 2024
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
ISO 14823-1:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 Conformance . 3
6 Requirements . 3
7 Structure of pictogram code. 4
7.1 General .4
7.2 Current and deprecated signs .4
7.3 Relative object identifier .5
7.4 Country code .5
7.5 Pictogram code and object identifier (OID) node information .6
8 Numbering of pictogram codes . 8
8.1 General .8
8.2 Mnemonic of the pictogram code .8
8.3 Pictogram code (without country code) no. 11111 to no. 11999: Traffic sign pictograms
(danger warning) .8
8.4 Pictogram code (without country code) no. 12111 to no. 12999: Traffic sign pictograms
(regulatory) . 15
8.5 Pictogram code (without country code) no. 13111 to no. 13992: Traffic sign pictograms
(informative) .24
8.6 Pictogram code (without country code) no. 21111 to no. 21999: Public facilities
pictograms (public facilities) . 33
8.7 Pictogram code (without country code) no. 31111 to no. 31999: Ambient conditions
pictograms (ambient condition) . . 35
8.8 Pictogram code (without country code) no. 32111 to no. 32999: Ambient conditions
pictograms (road condition) . 36
8.9 Pictogram code (without country code) no. 41111 to no. 41999: Supplementary panel
pictograms . 36
Annex A (normative) ASN.1 description of GDD (version 2) .42
Annex B (normative) Attributes of GDD (version 2) .43
Annex C (informative) UML diagram of GDD (version 2) .53
Annex D (normative) Specializations (version 2) .56
Annex E (normative) ASN.1 description of GDD (version 1) .58
Annex F (normative) Attributes of GDD (version 1) .59
Annex G (informative) UML diagram of GDD (version 1) .65
Annex H (normative) List of directions at diverging point .66
Annex I (informative) Example GDD data set for the United Nations (UN) and selected countries .70
Annex J (informative) Pictogram code and OID node information (version 1) .71
Bibliography .73

iii
ISO 14823-1:2024(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 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, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 278,
Intelligent transport systems, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
This first edition cancels and replaces the first edition (ISO 14823:2017), which has been technically revised.
The main changes are as follows:
— the mechanism of "relative object identifier" has been specified (7.3);
— the inclusion of up to 4 pictograms in the graphic data dictionary (GDD) has been allowed;
— redundant pictogram codes have been deleted;
— new pictogram codes requested by certain countries have been added;
— new attributes to comply with new signs have been added;
— redundant attributes have been deleted;
— existing attributes have been changed to be more flexible and to be harmonized with existing International
Standards.
A list of all parts in the ISO 14823 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 14823-1:2024(en)
Introduction
0.1 Design principle
This document specifies a graphic data dictionary (GDD) that has been developed with the intent of creating
a common basis for transmitting encoded information for existing road traffic signs and pictograms. The
coding system has been developed to be language-independent, such that data that can be interpreted,
irrespective of language or regional differences. The GDD supports intelligent transport system (ITS)
application such as in-vehicle signage or in-vehicle information.
This document supports:
— the efficient IT-centric encoding for ITS messaging to represent specific road traffic signs and pictograms,
and
— the consistent decoding of encoded road traffic signs and pictogram data for display in ITS.
This document can support the translation of signs and pictograms with a similar purpose from the
representation used in one country to the representation used in another country.
Existing road traffic signs and pictograms from various countries are listed in Annex I.
0.2 Background of revision
The first edition of this document (ISO 14823:2017) used the country codes stipulated by ISO 3166-1 to
distinguish the country where the GDD is provided and used the following numbering structure to identify
the pictogram codes stipulated in Clause 8.
— The two-digit category of the sign.
— The one-digit nature of the sign.
— The two-digit serial number of the sign.
However, this mechanism lacked a global identification of pictogram codes and a flexibility when adding
new pictogram codes.
To cope with these issues, the present document, ISO 14823-1:2023, has been developed.
0.3 Backward compatibility
This document has been developed to be backward compatible with ISO 14823:2017 to assist in transitions
from earlier implementations, while not hindering spreads of ISO 14823:2017 and being able to support
many new features.
Specifically, the GDD allows the selection of two versions described in 7.1. The GDD allows the use of the
ASN.1 description specified in Annex A or Annex E, and allows the use of the attributes specified in Annex B
or Annex F.
v
International Standard ISO 14823-1:2024(en)
Intelligent transport systems — Graphic data dictionary —
Part 1:
Specification
1 Scope
This document specifies a graphic data dictionary (GDD), a system of standardized codes for existing road
traffic signs and pictograms used to deliver traffic and traveller information (TTI). The coding system can
be used in the formation of messages within intelligent transport systems (ITS).
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 3166-1, Codes for the representation of names of countries and their subdivisions — Part 1: Country code
ISO 8601-1:2019, Date and time — Representations for information interchange — Part 1: Basic rules
ISO/IEC 8824-1, Information technology — Abstract Syntax Notation One (ASN.1) — Part 1: Specification of
basic notation
ISO/IEC 8825-5:2021, Information technology — ASN.1 encoding rules — Part 5: Mapping W3C XML schema
definitions into ASN.1
ISO/IEC 8859-1, Information technology — 8-bit single-byte coded graphic character sets — Part 1: Latin
alphabet No. 1
ISO/IEC 19505-1, Information technology — Object Management Group Unified Modeling Language (OMG UML)
— Part 1: Infrastructure
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
attribute
coded information which can be associated to a pictogram (3.5) in order to clarify the meaning of the
pictogram
ISO 14823-1:2024(en)
3.2
country code
internationally recognized codes
Note 1 to entry: When referring to countries and subdivisions of countries, the description in ISO 3166-1:2020, 3.3
applies.
3.3
graphic data dictionary
catalogue of codes for pictograms (3.5) organized systematically
3.4
nature category number
number to identify the nature of the pictogram category code (3.7)
3.5
pictogram
graphic or icon on static signs or rendered on a display of an IT system, such as a monitor or a VMS pictogram
display, to inform travellers of information such as road conditions, traffic elements, traffic regulations or
public facilities
3.6
pictogram code
combination of a service category code (3.11) and a pictogram category code (3.7) optionally including a
country code (3.2) in version 1
Note 1 to entry: See 7.1 for an explanation of "version 1".
3.7
pictogram category code
code assigned to a set of pictograms (3.5) conveying the same meaning for a given service category code
(3.11)
3.8
qualifier
parameter for an attribute (3.1) used to express the meaning of pictogram (3.5) quantitatively
3.9
relative object identifier
value which identifies an object by its position relative to some known object identifier
[SOURCE: ISO/IEC 8824-1:2021, 3.8.63]
3.10
serial number
number to identify the pictogram (3.5) belonging to the nature category
3.11
service category code
code assigned to distinguish the service category such as a regulation or public facilities
3.12
specialization
relationship between a more general class (the parent) and a more specific class (the child) that is fully
consistent with the general class and that adds additional information
[SOURCE: ISO/IEC 11179-3:2023, 3.1.8, modified — “” preceding the definition has been
deleted. Notes to entry have been removed.]

ISO 14823-1:2024(en)
4 Abbreviated terms
ASN.1 Abstract Syntax Notation One
C-ITS cooperative intelligent transport systems
HGV heavy goods vehicle
ITS intelligent transport systems
IT information technology
LPG liquefied petroleum gas
OID object identifier
UML unified modeling language
UN United Nations
VMS variable message sign
5 Conformance
An implementation is conformant with this document when the following conditions are met.
— The implementation and transmission of graphic data shall conform to the requirements listed in this
document.
— The pictogram code shall be selected from the categorized codes listed in this document.
6 Requirements
The intended usage of this document is to support the efficient IT-centric encoding for ITS messaging to
represent specific road traffic signs and pictograms and the consistent decoding of encoded road traffic
signs and pictogram data for display in ITS.
This document can support the translation of signs and pictograms with similar purpose from the
representation used in one country to the representation used in another country. For illustrative purposes,
it is foreseen that this document will be able to be used to encode information concerning a specific pictogram
that is then embedded into other information to be exchanged; if needed, on receipt of this information, the
receiver will be able to use the contents of this document to decode the information concerning the specific
pictogram to support its display across a range of dissemination systems. Examples of these dissemination
systems can include: traffic control centre system user interfaces, variable message signs (VMS). public
access terminals, mobile personal information systems, and on-board units.
Requirements for ITS applications which utilize the GDD are as follows.
— Graphic data shall consist of a version number, relative object identifier or country code and optionally
an attribute indicator.
— The pictogram code shall be decided based on Table 1.
— The danger warning pictogram code shall be selected from Table 3.
— The regulatory pictogram code shall be selected from Table 4.
— The informative pictogram code shall be selected from Table 5.
— The public facilities pictogram code shall be selected from Table 6.

ISO 14823-1:2024(en)
— The supplementary panel and additional panel pictogram code shall be selected from Table 9.
— The integer value which indicates the direction shall be determined based on Table B.3 or Table F.3.
— If attribute indicator is on, graphic data shall include attributes listed in Table B.1 or Table F.1.
— When transmitting graphic data, it shall be coded based on the ASN.1 module specified in Annex A
(version 2) or on the ASN.1 module specified in Annex E (version 1).
NOTE For transmission efficiency purposes, compression can be considered. This is outside the scope of this
document.
7 Structure of pictogram code
7.1 General
The GDD provides a taxonomy of all registered sign types by assigning each sign type with a globally unique
pictogram code. This pictogram code allows the meaning of virtually any sign used for surface transport
to be adequately conveyed in a language-independent manner with a very short identifier coupled with
optional attributes.
There are two "versions" available for determining the structure of the pictogram code.
The first version (referred to collectively as “version 1”) uses the sequence of the country code (see 7.4) and
pictogram code (see 7.5) as specified by the GDD structure in Annex E.
Version 1 is expected to be used mainly when expanding or maintaining the existing C-ITS applications
which presently use GDD (i.e. ISO 14823:2017).
The second version (referred to collectively as “version 2”) uses the object identifier of the pictogram code
by using the ASN.1 relative object identifier specified in 7.3. This mechanism has been introduced to cope
with a global identification of pictogram codes and a flexibility when adding new pictogram codes.
Version 2 allows to the inclusion of up to 4 pictograms in the GDD.
In addition, some elements have been harmonized with DATEX II to be used in VMS signs.
It is up to each application or service to determine how to use these versions.
However, for reasons of facilitating implementations, it is recommended to avoid mixing versions in the
same application or service.
Version 1 and version 2 are maintained independently by introducing the notion of “revision” in complement
of the notion of “version”. Both the version and the revision are identified in the object identifier (OID) that
identifies the respective ASN.1 module.
Details of version 2 can be found in Annexes A, B, C and D while details of version 1 can be found in Annexes E,
F and G.
7.2 Current and deprecated signs
There are a number of signs in ISO 14823:2017 that are deprecated (no longer relevant or duplicated).
Each pictogram code of the GDD in this document (ISO 14823-1:2023) is labelled “current” or “deprecated”
together with a date of revision. Using this labelling enables legacy applications to continue to use these
deprecated sign codes but signals to new users that it is wise to use only current labelled codes. To ensure
backward compatibility, no code is reused, so that if a deprecated code is transmitted and the receiver does
not recognize it, no action is taken. In the future it is possible that some codes might be set to “obsolete”.

ISO 14823-1:2024(en)
The following are examples of deprecated signs and reasons for deprecation.
— Signs listed in Table 7 and Table 8 have been deprecated and moved to Table 3 as these signs should be
used in dangerous situations.
— Signs listed in Table 4 (from pictogram category no. 631 to no. 637) have been deprecated as these signs
should be presented using attributes.
— Signs listed in Table 4 (from pictogram category no. 365 to no. 368) have been deprecated as these signs
are replaced by signs listed in Table 4 (from pictogram category no. 361 to no. 364).
7.3 Relative object identifier
The international object identifier tree as defined in ISO/IEC 9834-1 is a tree whose root corresponds to this
document and whose nodes correspond to Registration Authorities responsible for allocating arcs from a
parent node.
The pictogram codes are registered on the international object identifier tree under the arc {joint-iso-
itu-t(2) its(28) gdd(5) }. The first three sub-arcs follow the numbering structure:
— the two-digit service category of the sign,
— the one-digit nature category of the sign,
— the two-digit serial number of the sign.
The taxonomy specified by the GDD allows maximum interoperability among implementations that might
differ in their level of support of GDD details. In other words, while the GDD has been designed to support
numerous potential use cases that require various levels of detail and virtually all sign types that might
be encountered within surface transport, the GDD has also been designed to accommodate applications
(especially receiving applications) that might not support the full scope of the GDD. Specifically, the
taxonomic structure of the GDD allows a sender to provide a very detailed pictogram code; if the receiver
does not understand the complete taxonomic sequence, it should still be able to classify the sign under a
parent category (or understand that it is safe to ignore).
For example, if a receiving application is notified of a sign with an object identifier of {joint(2) its(28)
gdd(5) warning(11) warning3(3) wildAnimal(63) unspecified(0) au(36) kangaroo(x) } ), it might be able to
display the intended Australian-specific kangaroo crossing warning sign to the driver. Another application
might generalize all object identifiers starting with {joint(2) its(28) gdd(5) warning(11) warning3(3)
wildAnimal(63) } sign to a generic wild animal crossing sign. Another application might generalize all object
identifiers starting with {joint(2) its(28) gdd(5) warning(11) } to be a generic warning sign. The level of
detail supported by an application is dependent upon the purpose of the receiving application and is beyond
the scope of the GDD.
To ensure that all signs described by the GDD are placed into this taxonomy, the GDD conveys the object
identifier of the pictogram code by using the ASN.1 relative object identifier type with a root node of
{joint(2) its(28) gdd(5) }. This allows a more efficient encoding of the object identifier while also ensuring
that all codes can be generalized according to the specified taxonomy. This structure still allows for further
regional specializations of the pictogram code specified within this standard according to the process
specified Annex D.
7.4 Country code
ISO 3166-1 shall be used to encode the countryCode in GddStructure.pictogramCode using two-letter codes
in upper case in accordance with ISO/IEC 8859-1 encoding. For example, if the on-board unit has multiple
countries' pictograms, it can render a pictogram on the display in accordance to each county code when the
traveller is driving through adjacent countries.
If present, the component countryCode in GddStructure.pictogramCode (version 1) shall contain a two-
letter country code that shall conform to ISO 3166-1, in upper case.

ISO 14823-1:2024(en)
7.5 Pictogram code and object identifier (OID) node information
The structure of the pictogram code including the relative object identifier is presented in Table 1. The
service category has following four types of categories.
1) Traffic signs: are officially established pictograms in each country to control traffic using a warning,
regulatory or informative sign.
2) Public facilities: indicate the existence of certain public facilities and their service details (e.g. toilets,
restaurants, first aid facilities, etc.).
3) Ambient conditions: indicate weather condition on the road (e.g. rainfall, flood, fog, etc.) and road
conditions (traffic congestion, accident, etc.) which can potentially affect the traffic flow.
4) Supplemental panels: are attached to the main signs to provide supplemental information using text or
numbers.
NOTE Users of version 2 are encouraged to use attributes instead of supplemental panels where it is possible.
Each pictogram category code has a nature category number and a serial number.
Pictograms to be used for information display may vary from country to country, political jurisdiction to
political jurisdiction, or system operator to system operator.
Pictogram codes and OID node information are described in Annex J.

ISO 14823-1:2024(en)
Table 1 — Pictogram code (for version 1 omitting country code) and relative object identifier
Pictogram code Relative object
identifier
Service category code Pictogram category code
Main category Sub-category Nature category number Serial
number
trafficSign (1) dangerWarning (1) warning1 (1) xx {11 1 xx}
warning2 (2) xx {11 2 xx}
warning3 (3) xx {11 3 xx}
warning4 (4) xx {11 4 xx}
warning5 (5) xx {11 5 xx}
warning6 (6) xx {11 6 xx}
warning7 (7) xx {11 7 xx}
warning8 (8) xx {11 8 xx}
warning9 (9) xx {11 9 xx}
regulatory (2) priority1 (1) xx {12 1 xx}
priority2 (2) xx {12 2 xx}
priority3 (3) xx {12 3 xx}
prohibitionOrRestriction (4) xx {12 4 xx}
prohibitionOrRestriction (5) xx {12 5 xx}
prohibitionOrRestriction (6) xx {12 6 xx}
mandatory (7) xx {12 7 xx}
mandatory (8) xx {12 8 xx}
mandatory (9) xx {12 9 xx}
Informative [3] advanceDirection1 [1] xx {13 1 xx}
advanceDirection1 [2] xx {13 2 xx}
advanceDirection1 [3] xx {13 3 xx}
Instruction [1] xx {13 4 xx}
Notification [1] xx {13 5 xx}
laneGuidance [1] xx {13 6 xx}
alert xx {13 7 xx}
roadOrPlaceIdentification1 [1] xx {13 8 xx}
roadOrPlaceIdentification2 [2] xx {13 9 xx}
publicFacilities [2] publicFacilities [1] publicFacilitiesAndServices1 [1] xx {21 1 xx}
publicFacilitiesAndServices1 [2] xx {21 2 xx}
ambientConditions [3] ambientConditions [1] ambientConditions1 [1] xx {31 1 xx}
ambientConditions1 [2] xx {31 2 xx}
roadConditions [1] roadConditions [1] xx {32 1 xx}
supplementaryPanel supplementaryPanel [1] supplementaryPanel [1] xx {41 1 xx}
[4]
An additional (or supplementary) panel is a device placed below (sometimes above) a road sign to make the
meaning of the sign or symbol more explicit or to limit the application of the sign to certain periods. It can
also be used to show the distance from the sign to the beginning of the dangerous section of road or of the
zone to which the regulation applies, or to show the length of the dangerous section of road or of the zone to
which the regulation applies.
If regulatory signs are to be restricted to certain road users or if certain road users are to be exempt from
the regulation, this is done through the same device.

ISO 14823-1:2024(en)
8 Numbering of pictogram codes
8.1 General
The GDD specifies the pictogram code and the rule for generating a mnemonic associated with each
pictogram code.
In the following tables starting from 2 pictograms codes may also be given a country code in version 1
according to the specifications of this document.
The status of pictograms code is labelled “C” (=current) or "D” (=deprecated) in the following tables.
8.2 Mnemonic of the pictogram code
A mnemonic of the pictogram code can be generated by transforming each pictogram code name specified in
the following subclauses in accordance with the following rules.
— In lower CamelCase notation
— The ASN.1 rules which shall be in accordance with ISO/IEC 8824-1 (e.g. no spaces, no parenthesis)
— No articles (the, a, an)
Table 2 — Examples of mnemonic
Pictogram code Pictogram code Mnemonic
name
Service Pictogram
category category
code code
11 Intersection
where the priority
is prescribed by
intersectionWherePriorityIsPrescribedByGeneralPri-
the general priori-
orityRuleCrossroads
ty rule
(Crossroads)
Forked (off to
upper right) in-
tersection where
forkedOffToUpperRightIntersectionWherePriorityIs-
114 the priority is
PrescribedByGeneralPriorityRule
prescribed by the
general priority
rule
Intersection
where the priority
is prescribed by
intersectionWherePriorityIsPrescribedByGeneralPri-
the general priori-
orityRuleTJunction)
ty rule
(T junction)
8.3 Pictogram code (without country code) no. 11111 to no. 11999: Traffic sign pictograms
(danger warning)
Pictograms falling under this category shall be used to give the road users advance warning for an adverse
road condition, any hazards to safe driving, or any other conditions for which they should take notice.

ISO 14823-1:2024(en)
Table 3 — List of traffic sign pictograms (danger warning)
Pictogram code (with- Pictogram code Definition Status
out country code) name
Service Pictogram
category category
code code
11 Intersection C
where the priority
is prescribed by
Warning of the existence of a cross-shaped intersec-
the general priori-
tion ahead.
ty rule
(Crossroads)
Intersection C
where the priority
is prescribed by
112 Warning of the existence of a side road ahead.
the general priori-
ty rule
(Side road right)
Intersection C
where the priority
is prescribed by
Warning of a side road ahead (reverse type of code
the general priori-
no. 112).
ty rule
(Side road left)
Forked (off to C
upper right) in-
tersection where
Warning of the existence of a side road. Fork (off to
114 the priority is
upper right) type of code no. 112.
prescribed by the
general priority
rule
Forked (off to C
upper left) inter-
section where
Warning of the existence of a side road. Fork (off to
115 the priority is
upper left) type of code no. 113.
prescribed by the
general priority
rule
Intersection C
where the priority
is prescribed by
Warning of a T-shaped level junction at the end of the
the general priori-
road
ty rule
(T junction)
Intersection C
where the priority
is prescribed by
117 Warning of a Y-shaped level intersection ahead.
the general priori-
ty rule
(Y intersection)
Intersection C
where the priority
is prescribed by
Warning of a staggered level intersection from left
the general priori-
ahead.
ty rule
(Staggered inter-
section from left)
ISO 14823-1:2024(en)
TTabablele 3 3 ((ccoonnttiinnueuedd))
Pictogram code (with- Pictogram code Definition Status
out country code) name
Service Pictogram
category category
code code
Junction on bend C
119 Warning of a junction unseen on bend ahead.
ahead
Intersection C
where the priority
is prescribed by
the general priori-
Warning of a staggered level intersection from right
ty rule
ahead.
(Staggered in-
tersection from
right)
Reserved for
121~131
future use
Intersection with C
a road, the users
132 Warning of a priority road at intersection.
of which must
give way
Intersection with C
a road, the users
of which must
Warning of a priority road at T-shaped intersection
give way
where traffic joining from the left must give way.
(T-shaped cross-
ing left)
Intersection with C
a road the users of
which must give
Warning of a priority road at T-shaped intersection
way
where traffic joining from the right must give way.
T-shaped crossing
right
Intersection with C
a road, the users
of which must
Warning of a priority road at T-shaped forked inter-
give way
135 section where the joining traffic from the left must
give way.
(T-shaped cross-
ing of fork type
lower left)
Intersection with C
a road, the users
of which must
Warning of a priority road at reversed T-shaped
give way
136 forked intersection where the joining traffic from the
right must give way.
(T-shaped cross-
ing of fork type
lower right)
Reserved for
137~147
future use
Warning of D
roundabout
148 Warning of a clockwise roundabout ahead.
(Clockwise)
Warning of C
149 Warning of a roundabout ahead.
roundabout
Reserved for
150~160
future use
ISO 14823-1:2024(en)
TTabablele 3 3 ((ccoonnttiinnueuedd))
Pictogram code (with- Pictogram code Definition Status
out country code) name
Service Pictogram
category category
code code
Warning of a dangerous single curve to the right C
161 Bend to right
ahead.
Warning of a dangerous single curve to the left C
162 Bend to left
ahead.
Reserved for
163~173
future use
Warning of a single sharp curve (turn) to the right. C
A turn is differentiated from a curve by combining
174 Right turn
all elements of speed, radius of curve, road rate of
incline, intersection angle and visible distance.
Notice of a single sharp curve (turn) to the left. A C
turn is differentiated from a curve by combining
175 Left turn
all elements of speed, radius of curve, road rate of
incline, intersection angle and visible distance.
Reserved for
176~186
future use
Reverse curve Warning of a combination of two curves (right and C
(right and left) left) ahead (S-bend).
Reverse curve Warning of a combination of two curves (left and C
(left and right) right) ahead (S-bend).
189~210 Reserved for
future use
211 Double bend, first Warning of dangerous double or multiple bends C
to right which start with a right curve.
212 Double bend, first Warning of dangerous double or multiple bends C
to left which start with a left curve.
213~223 Reserved for
future use
224 Winding road Warning of a winding section, which starts with a D
(first to the right) right curve.
225 Winding road Warning of a winding section, which starts with a D
(first to the left) left curve.
226~235 Reserved for
future use
236 Level crossing Warning of the existence of a level railway crossing C
with gate or with gates or barrier ahead.
barrier
237 Level crossing Warning of a level railroad crossing point without C
without gate or gate or barrier ahead.
barrier
238 Intersection with Warning of an intersection with a tramway line C
a tramway line ahead.
239 School crossing Warning of an area where children can exit from a D
ahead school or playground, frequently pass by and cross
the road from the right side.
240 Reserved for
future use
241 Pedestrian cross- Warning of an ar
...