ISO/TR 14823-2:2019

TECHNICAL ISO/TR
REPORT 14823-2
First edition
2019-09
Intelligent transport systems —
Graphic data dictionary —
Part 2:
Examples
Systèmes de transport intelligents — Dictionnaire de données
graphiques —
Partie 2: Exemples
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Use case . 2
6 Examples of ASN.1 description . 2
6.1 ASN.1 schema . 2
6.2 pictogramCode . 6
6.3 Attributes . 7
6.3.1 Basic structure . 7
6.3.2 applicablePeriod . 7
6.3.3 exempted ApplicablePeriod . 9
6.3.4 signSection .10
6.3.5 numberOfLane and directionalFlowOfLane .11
6.3.6 applicableVehicleDimensions .12
6.3.7 speedLimits .15
6.3.8 rateOfIncline .16
6.3.9 distanceBetweenVehicles .17
6.3.10 destinationInformation .17
6.3.11 Combination of multiple signs with an attribute .24
Bibliography .26
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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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
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.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 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 2019 – All rights reserved

Introduction
This document presents examples of ASN.1 coding of 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. It supports
Intelligent Transport System (ITS) applications 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.
TECHNICAL REPORT ISO/TR 14823-2:2019(E)
Intelligent transport systems — Graphic data dictionary —
Part 2:
Examples
1 Scope
1)
This document reports examples of ASN.1 codes based on ISO 14823-1 , which specifies a graphic data
dictionary (GDD) including the ASN.1 coding rule for GDD.
NOTE Some of the ASN.1 codes described in this document are re-formatted based on ISO 14813-6.
2 Normative references
There are no normative references in this document.
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
attribute
code attached to the pictogram (3.4) in order to clarify the meaning of the pictogram
3.2
country code
internationally recognised codes stipulated by ISO 3166-1 when referring to countries and subdivisions
of countries
3.3
graphic data dictionary
GDD
catalogue of codes for pictograms (3.4) organised systematically
3.4
pictogram
sign or icon rendered on a display of an IT system such as a computer or VMS to inform travellers of
information such as traffic regulations or public facilities
3.5
pictogram category code
codes assigned to the more detailed category of a pictogram (3.4) type under the service category
3.6
qualifier
parameter for an attribute (3.1) used to express the meaning of pictogram (3.4) quantitatively
1) To be published.
4 Abbreviated terms
ASN.1 Abstract Syntax Notation One
ITS Intelligent Transport Systems
IT Information Technology
UML Unified Modelling Language
U.N. United Nations
VMS Variable Message Sign
5 Use case
A typical use case of GDD is in-vehicle signage service, which is detailed in ISO/TS 17425.
6 Examples of ASN.1 description
6.1 ASN.1 schema
The ASN.1 description of GDD consists of pictogramCode and attributes. Attributes are optionally
utilised when a pictogram has quantitative factors such as time, length or angle. The ASN.1 schema of
GDD is as follows.
GDD {iso (1) standard (0) gdd(14823) version1 (0)}
DEFINITIONS AUTOMATIC TAGS::=
BEGIN
GddStructure::= SEQUENCE{
pictogramCode    Pictogram,
attributes      GddAttributes OPTIONAL
}
Pictogram::=SEQUENCE {
countryCode   Pictogram-countryCode OPTIONAL,
serviceCategoryCode   Pictogram-serviceCategory,
pictogramCategoryCode  Pictogram-category
}
Pictogram-countryCode::=OCTET STRING (SIZE (2))

Pictogram-serviceCategory::=CHOICE {
trafficSignPictogram   Pictogram-trafficSign,
publicFacilitiesPictogram Pictogram-publicFacilitySign,
ambientOrRoadConditionPictogram Pictogram-conditionsSign
}
Pictogram-category::= SEQUENCE {
nature    Pictogram-nature,
serialNumber    Pictogram-serialNumber
}
Pictogram-trafficSign::=ENUMERATED{
dangerWarning (11),
regulatory (12),
informative (13),
...
}
Pictogram-publicFacilitySign ::= ENUMERATED {
publicFacilities (21),
...
}
Pictogram-conditionsSign::=ENUMERATED{
ambientCondition(31),
2 © ISO 2019 – All rights reserved

roadCondition (32),
...
}
Pictogram-nature::=INTEGER (1.9)
Pictogram-serialNumber::=INTEGER (0.99)

GddAttributes::= SEQUENCE (SIZE(1.8),.) OF CHOICE{
dtm InternationalSign-applicablePeriod,
edt InternationalSign-exemptedApplicablePeriod,
dfl InternationalSign-directionalFlowOfLane,
ved InternationalSign-applicableVehicleDimensions,
spe InternationalSign-speedLimits,
roi InternationalSign-rateOfIncline,
dbv InternationalSign-distanceBetweenVehicles,
ddd InternationalSign-distinationInformation,
set InternationalSign-section,
nol InternationalSign-numberOfLane
}
InternationalSign-applicablePeriod::= SEQUENCE {
year SEQUENCE {
yearRangeStartYear Year,
yearRangeEndYear Year
} OPTIONAL,
month-day SEQUENCE {
dateRangeStartMonthDate MonthDay,
dateRangeEndMonthDate MonthDay
} OPTIONAL,
repeatingPeriodDayTypes RPDT OPTIONAL,
hourMinutes SEQUENCE {
timeRangeStartTime HoursMinutes,
timeRangeEndTime HoursMinutes
} OPTIONAL,
dateRangeOfWeek DayOfWeek OPTIONAL,
durationHourminute HoursMinutes OPTIONAL
}
MonthDay::= SEQUENCE {
month MonthDay-month,
day MonthDay-day
}
HoursMinutes::= SEQUENCE {
hours HoursMinutes-hours,
mins HoursMinutes-mins
}
Year::=INTEGER(2000.2127,.)
MonthDay-month::=INTEGER (1.12)
MonthDay-day::=INTEGER (1.31)
HoursMinutes-hours::=INTEGER (0.23)
HoursMinutes-mins::=INTEGER (0.59)
RPDT::= BIT STRING {national-holiday (0), even-days(1), odd-days(2), market-day(3) } (SIZE
(4))
DayOfWeek::= BIT STRING {unused(0), monday(1), tuesday(2), wednesday(3), thursday(4),
friday(5), saturday(6), sunday(7)} (SIZE (8))

InternationalSign-exemptedApplicablePeriod::= InternationalSign-applicablePeriod

InternationalSign-section::= SEQUENCE{
startingPointLength  Distance OPTIONAL,
continuityLength   Distance OPTIONAL
}
InternationalSign-numberOfLane::= INTEGER(0.99)

InternationalSign-directionalFlowOfLane::= INTEGER {
sDL  (1),
sLT  (2),
sRT  (3),
lTO  (4),
rTO  (5),
cLL  (6),
cRI  (7),
oVL  (8)
} (1.8)
InternationalSign-applicableVehicleDimensions::= SEQUENCE{
vehicleHeight  Distance OPTIONAL,
vehicleWidth  Distance OPTIONAL,
vehicleLength Distance OPTIONAL,
vehicleWeight  Weight OPTIONAL
}
Distance::= SEQUE
...