Intelligent transport systems -- Graphic data dictionary

This document reports examples of ASN.1 codes based on ISO 14823-1[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. [1] To be published.

Systèmes de transport intelligents -- Dictionnaire de données graphiques

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Publication Date
02-Sep-2019
Current Stage
6060 - International Standard published
Start Date
27-Jul-2019
Completion Date
03-Sep-2019
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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/TR 14823-2:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO/TR 14823-2:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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Published in Switzerland
ii © ISO 2019 – All rights reserved
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ISO/TR 14823-2:2019(E)
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

© ISO 2019 – All rights reserved iii
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ISO/TR 14823-2:2019(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 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.

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
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ISO/TR 14823-2:2019(E)
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.

© ISO 2019 – All rights reserved v
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TECHNICAL REPORT ISO/TR 14823-2:2019(E)
Intelligent transport systems — Graphic data dictionary —
Part 2:
Examples
1 Scope

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.
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ISO/TR 14823-2:2019(E)
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),
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ISO/TR 14823-2:2019(E)
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),
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ISO/TR 14823-2:2019(E)
cRI (7),
oVL (8)
} (1..8)
InternationalSign-applicableVehicleDimensions::= SEQUENCE{
vehicleHeight Distance OPTIONAL,
vehicleWidth Distance OPTIONAL,
vehicleLength Distance OPTIONAL,
vehicleWeight Weight OPTIONAL
Distance::= SEQUENCE{
value INTEGER(1..16384),
unit Code-Units(2..4|6..8)
Weight::= SEQUENCE {
value INTEGER(1..16384),
unit Code-Units (10..12)
Code-Units::= INTEGER {
kmperh (0),
milesperh (1),
kilometre (2),
metre (3),
decimetre (4),
centimetre (5),
mile (6),
yard (7),
foot (8),
minutesOfTime (9),
tonnes (10),
hundredkg (11),
pound (12),
rateOfIncline (13),
durationinminutes (14)
} (0..15)
InternationalSign-speedLimits::= SEQUENCE{
speedLimitMax INTEGER(0..250) OPTIONAL,
speedLimitMin INTEGER(0..250) OPTIONAL,
unit Code-Units (0..1)
InternationalSign-rateOfIncline::= INTEGER(1..32)
InternationalSign-distanceBetweenVehicles::= Distance
InternationalSign-distinationInformation::= SEQUENCE{
junctionDirection DistinInfo-junctionDirection OPTIONAL,
roundaboutCwDirection DistinInfo-roundaboutCwDirection OPTIONAL,
roundaboutCcwDirection DistinInfo-roundaboutCcwDirection OPTIONAL,

ioList SEQUENCE (SIZE (1..8,...)) OF DistinationInformationIO

}
DistinationInformationIO::=SEQUENCE{
arrowDirection IO-arrowDirection,

destPlace SEQUENCE (SIZE (1..4,...)) OF DestinationPlace OPTIONAL,

destRoad SEQUENCE (SIZE (1..4,...)) OF DestinationRoad OPTIONAL,

roadNumberIdentifier IO-roadNumberIdentifier OPTIONAL,
streetName IO-streetName OPTIONAL,
streetNameText IO-streetNameText OPTIONAL,
distanceToDivergingPoint DistanceOrDuration OPTIONAL,
distanceToDestinationPlace DistanceOrDuration OPTIONAL
}
DestinationPlace::= SEQUENCE{
destType DestinationType,
destRSCode GddStructure (WITH COMPONENTS {..., attributes ABSENT}) OPTIONAL,
destBlob DestPlace-destBlob OPTIONAL,
placeNameIdentification DestPlace-placeNameIdentification OPTIONAL,
placeNameText DestPlace-placeNameText OPTIONAL
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ISO/TR 14823-2:2019(E)
}
DestinationRoad::= SEQUENCE{
derType DestinationRoadType,
roadNumberIdentifier DestRoad-roadNumberIdentifier OPTIONAL,
roadNumberText DestRoad-roadNumberText OPTIONAL
}
DistanceOrDuration::= SEQUENCE {
value DistOrDuration-value,
unit DistOrDuration-Units
DistinInfo-junctionDirection::=INTEGER(1..128)
DistinInfo-roundaboutCwDirection::=INTEGER(1..128)
DistinInfo-roundaboutCcwDirection::=INTEGER(1..128)
IO-arrowDirection::=INTEGER(0..7)
IO-roadNumberIdentifier::=INTEGER(1..999)
IO-streetName::=INTEGER(1..999)
IO-streetNameText::=UTF8String
DestPlace-destBlob::=OCTET STRING
DestPlace-placeNameIdentification::=INTEGER(1..999)
DestPlace-placeNameText::=UTF8String
DestRoad-roadNumberIdentifier::=INTEGER(1..999)
DestRoad-roadNumberText::= UTF8String
DistOrDuration-value::= INTEGER(1..16384)
DistOrDuration-Units::= Code-Units (2..9)
DestinationRoadType::= INTEGER {
none (0),
nationalHighway (1),
localHighway (2),
tollExpresswayMotorway (3),
internationalHighway (4),
highway (5),
expressway (6),
nationalRoad (7),
regionalProvincialRoad (8),
localRoad (9),
motorwayJunction (10),
diversion (11),
rfu1 (12),
rfu2 (13),
rfu3 (14),
rfu4 (15)
} (0..15, ...)
DestinationType::= INTEGER {
none (0),
importantArea (1),
principalArea (2),
generalArea (3),
wellKnownPoint (4),
country (5),
city (6),
street (7),
industrialArea (8),
historicArea (9),
touristicArea (10),
culturalArea (11),
touristicRoute (12),
recommendedRoute (13),
touristicAttraction (14),
geographicArea (15)
} (0..15, ...)
END
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ISO/TR 14823-2:2019(E)
6.2 pictogramCode

ASN.1 codes of PictogramCode are shown below. It consists of countryCode, serviceCategoryCode and

pictogramCategoryCode. A countryCode refers to the country or subdivision of country where traffic

signs are used and is decided based on ISO 3166-1. serviceCategoryCode and pictogramCategoryCode

are used to digitally show the meaning of a traffic sign and are decided based on ISO 14823-1:—, Tables

1 and 2.
EXAMPLE 1

Figure 1 is an example sign which indicates an “intersection where the priority is prescribed by the

general priority rule (crossroads)”. The ASN.1 code of this example is shown below.

example1 GddStructure ::= {
pictogramCode {
serviceCategoryCode trafficSignPictogram:11,
pictogramCategoryCode{
nature 1,
serialNumber 11
}
}
Figure 1 — Sign of example 1
EXAMPLE 2

Figure 2 shows example signs which indicate an overtaking (right hand side of Figure 2) and a parking

(left hand side of Figure 2) is prohibited simultaneously. In this case, each sign's ASN.1 code shall be

coded separately (example2-1 and example2-2) and encoded separately, as ISO 14823-1 does not allow a

sequential structure of GddStructures.
example2-1 GddStructure ::= {
pictogramCode {
serviceCategoryCode trafficSignPictogram:12,
pictogramCategoryCode{
nature 5,
serialNumber 77
}
}
example2-2 GddStructure ::= {
pictogramCode {
serviceCategoryCode trafficSignPictogram:12,
pictogramCategoryCode{
nature 5,
serialNumber 42
}
}
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ISO/TR 14823-2:2019(E)
Figure 2 — Sign of example 2
6.3 Attributes
6.3.1 Basic structure

ASN.1 codes of GddAttributes consists of 10 elements that can be used selectively.

6.3.2 applicablePeriod
This attribute indicates the date/time/period status when the sign is valid.
EXAMPLE 3

Figure 3 is an example sign which indicates roadworks will start on 31 December 2017, at 0:00 a.m. and

end on 1 January 2018, at 12:30 a.m. The ASN.1 code of this example is shown below.

example3 GddStructure ::= {
pictogramCode {
serviceCategoryCode trafficSignPictogram:11,
pictogramCategoryCode{
nature 1,
serialNumber 11
}
},
attributes{
...

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