ISO/TS 17425:2016

Intelligent transport systems — Cooperative systems — Data exchange specification for in-vehicle presentation of external road and traffic related data

ISO/TS 17425:2016 specifies the In-Vehicle Signage service and application that delivers In-Vehicle Signage information to ITS stations (vehicle ITS stations or personal ITS stations devices) concerning road and traffic conditions, qualified by road authorities/operators, in a consistent way with road authority's/operator's requirements, in the manner that is coherent with the information that would be displayed on a road sign or variable message sign (VMS). NOTE A Variable Message Sign is also named dynamic message sign. Both terms are considered as synonyms and can be used interchangeably. In the text below, only variable message sign and its abbreviated term VMS are used. ISO/TS 17425:2016 defines the following: - the In-Vehicle Signage service and the In-Vehicle Signage application that instantiates this ITS service; - the requirements to be fulfilled by the In-Vehicle Signage service; - the requirements for using functions provided by the ITS station facilities layer supporting the use of the In-Vehicle Signage service; - the ITS-S application processes in the different ITS station, that instantiate the In-Vehicle Signage ITS service. ISO/TS 17425:2016 also specifies: the sets of communication requirements and objectives (profiles) using the methods defined in ISO/TS 17423 to select the level of performance (best effort or real-time, etc.), confidence and security (authentication, encryption, etc.) for each communication flow between ITS stations in the scope of the In-Vehicle Signage service. This Technical Specification defines the selection of relevant functions and procedures provided by the ITS station facilities layer (ISO/TS 17429) and defines the message structure, content, syntax, atomic elements to be used by the In-Vehicle Signage application. NOTE This application is colloquially called "In-Vehicle Signage". The In-Vehicle Signage service includes the on-board information management. This management ensures contextual coherence of the end-user ITS service (e.g. vehicle characteristics, message priority, etc. avoiding amongst others things the presentation of conflicting information to end-users). The production of information supporting the In-Vehicle Signage application, its qualification, and its relevance are out of the scope of this Technical Specification. ISO/TS 17425:2016 does not specify the design of in-vehicle Human Machine Interfaces (HMI), but it does specify requirements that such interfaces shall be capable of supporting in order to permit the correct dissemination and use of information provided by the In-Vehicle Signage service.

Systèmes intelligents de transport — Systèmes coopératifs — Spécifications d'échange des données pour la présentation dans le véhicule de la route externe et des données relatives au trafic

General Information

• Status: Published
• Publication Date: 16-May-2016
• ICS: 03.220.01 - Transport in general
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 18 - Cooperative systems
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 16-Aug-2022

Relations

• Consolidates: ISO/IEC 9594-4:2001 - Information technology — Open Systems Interconnection — The Directory: Procedures for distributed operation — Part 4:
• Effective Date: 06-Jun-2022

Standards Content (Sample)

TECHNICAL ISO/TS
SPECIFICATION 17425
First edition
2016-05-15
Intelligent transport systems —
Cooperative systems — Data
exchange specification for in-vehicle
presentation of external road and
traffic related data
Systèmes intelligents de transport — Systèmes coopératifs —
Spécifications d’échange des données pour la présentation dans le
véhicule de la route externe et des données relatives au trafic
Reference number
ISO/TS 17425:2016(E)
©
ISO 2016

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ISO/TS 17425:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
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ISO/TS 17425:2016(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 4
5 Service definition and main concepts . 4
5.1 General . 4
5.2 Service definition . 6
5.2.1 Definition . 6
5.2.2 Message categories . 6
5.2.3 Core services . 6
5.2.4 Additional services . . 7
5.3 Fundamental parameters . 7
5.3.1 Spatial relevance . 7
5.3.2 Temporal validity . . . 8
5.3.3 Other parameters . 9
5.4 Example of system implementation . 9
5.4.1 General description . 9
5.4.2 Interface identification .10
6 Roles and responsibilities .10
6.1 Scenarios for In-Vehicle Signage .10
6.2 System operation roles in scenario I–I–V .12
6.3 Possible actors in In-Vehicle Signage .13
7 Requirements and recommendations.14
7.1 General .14
7.2 General requirements .14
7.3 Message content .14
7.4 Message management requirements .15
7.4.1 IVS sending ITS station requirements .15
7.4.2 Roadside ITS station .16
7.4.3 IVS receiving ITS station requirements .16
7.4.4 Transmission of IVS information to the HMI control unit .17
7.5 Recommendations for information processing in relation with the presentation to
vehicle drivers .18
Annex A (informative) Profile 1 .20
Annex B (informative) Profile 2 .86
Annex C (informative) Elements about static road signing .90
Annex D (informative) Different technologies and layouts used in VMS .92
Annex E (informative) Topology of the relevance zone of the different road signs .95
Annex F (informative) Elements of data modelling using UML .100
Bibliography .103
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ISO/TS 17425:2016(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 meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 204, Intelligent transport systems.
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ISO/TS 17425:2016(E)

Introduction
Traditional fixed road signs are positioned on road verges to inform drivers about the applicable
regulations, or to warn them about dangers or to provide them with other general information – this
can be considered as roadside signage information. Beyond this fixed signage, the newer technologies
have now allowed for some time for more accurate dynamic presentation of roadside signage
information depending on the actual road and environmental conditions using variable or dynamic
message signs. With the advent of Cooperative Intelligent Transport Systems (C-ITS) it is possible to
provide more focused and timely guidance to vehicle controllers and drivers by supporting continuous
presentation of the content of roadside signage information in the vehicle along the impacted road
section rather only during the short moments its takes for a vehicle to pass traditional road signs.
Direct in-vehicle presentation of roadside signage information, called In-Vehicle Signage, facilitates the
potential provision of information to specific classes or characteristics of vehicles, and for potentially
more granular definition of affected road sections than stationary-position traditional fixed plate signs
and use of variable/dynamic road signs. It does not deal with contextual speeds which are covered by
ISO/TS 17426.
Delivering the In-Vehicle Signage service to road users can improve road safety, support traffic
management, and reduce greenhouse gas emissions. It does not preclude other usage of the delivered
information but such services are not in the scope of this Technical Specification.
All ITS services follow the same abstract process structure consisting of a sequence of detection (of an
event) including pre-processing of the detected content, execution of the service algorithm (processing
of detected content), and presentation or utilization of the service result. Figure 1 (extracted from
ISO/TS 17427) summarizes and details this process structure.
Figure 1 — General description of process for In-Vehicle Signage (from ISO/TS 17427:2014,
Annex A)
Based on this abstract and general description of process steps in an ITS service, a large number of
possible scenarios can be derived. This is true for In-Vehicle Signage. Every step in the process chain
can be executed by different actors or stakeholders. Additionally, the execution of a process step for
different spatial areas may be delivered by different actors. Each combination of different actors for
different process steps can be used to identify distinct scenarios.
Assuming that there are two main stakeholder groups in C-ITS, the Infrastructure stakeholder and
the Vehicle stakeholder, multiple combinations, and therefore multiple scenarios, are possible as every
step might be delivered by either stakeholder group (see Figure 2) or shared between both stakeholder
groups (see Figure 3).
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Figure 2 — Possible scenarios — Simple combinations
Figure 3 — Possible scenarios — Complex combinations
Every scenario is one specific of combination of stakeholders executing process steps. This Technical
Specification addresses the scenarios where detection, content pre-processing, and the information
service generation (see Figure 1) are delivered under the responsibility of the infrastructure
stakeholder group (scenario 7 as seen in Figure 2). In scenario 7, the information service presentation
takes place in the vehicle. Scenario 7 is considered in detail in this Technical Specification.
The defined C-ITS applications rely on the functionality and procedures defined within the
Communications Architecture and by the reference ITS station architecture (as defined in ISO 21217
and other International Standards or Technical Specifications from the C-ITS standard set).
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Annex A and Annex B contain profiles that define an instantiation for the IVS service. Annex A and
Annex B contain conditional mandatory requirements. There is no need to comply with these
requirements to claim compliance with this Technical Specification.
Annex A contains a profile that is communication technology agnostic. Annex B contains a profile
that is focused on ITS-G5. For details on the referenced standards, see the introduction of the
corresponding Annex.
These profiles are expected to be implemented and validated in European initiatives. Based on the
results of these initiatives, it is intended to specify one interoperable solution in a future version of this
Technical Specification.
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TECHNICAL SPECIFICATION ISO/TS 17425:2016(E)
Intelligent transport systems — Cooperative systems —
Data exchange specification for in-vehicle presentation of
external road and traffic related data
1 Scope
This Technical Specification specifies the In-Vehicle Signage service and application that delivers In-
Vehicle Signage information to ITS stations (vehicle ITS stations or personal ITS stations devices)
concerning road and traffic conditions, qualified by road authorities/operators, in a consistent way
with road authority’s/operator’s requirements, in the manner that is coherent with the information
that would be displayed on a road sign or variable message sign (VMS).
NOTE A Variable Message Sign is also named dynamic message sign. Both terms are considered as
synonyms and can be used interchangeably. In the text below, only variable message sign and its abbreviated
term VMS are used.
This Technical Specification defines the following:
— the In-Vehicle Signage service and the In-Vehicle Signage application that instantiates this ITS
service;
— the requirements to be fulfilled by the In-Vehicle Signage service;
— the requirements for using functions provided by the ITS station facilities layer supporting the use
of the In-Vehicle Signage service;
— the ITS-S application processes in the different ITS station, that instantiate the In-Vehicle Signage
ITS service.
This Technical Specification also specifies: the sets of communication requirements and objectives
(profiles) using the methods defined in ISO/TS 17423 to select the level of performance (best effort or
real-time, etc.), confidence and security (authentication, encryption, etc.) for each communication flow
between ITS stations in the scope of the In-Vehicle Signage service.
This Technical Specification defines the selection of relevant functions and procedures provided by the
ITS station facilities layer (ISO/TS 17429) and defines the message structure, content, syntax, atomic
elements to be used by the In-Vehicle Signage application.
NOTE This application is colloquially called “In-Vehicle Signage”.
The In-Vehicle Signage service includes the on-board information management. This management
ensures contextual coherence of the end-user ITS service (e.g. vehicle characteristics, message priority,
etc. avoiding amongst others things the presentation of conflicting information to end-users).
The production of information supporting the In-Vehicle Signage application, its qualification, and its
relevance are out of the scope of this Technical Specification.
This Technical Specification does not specify the design of in-vehicle Human Machine Interfaces (HMI),
but it does specify requirements that such interfaces shall be capable of supporting in order to permit
the correct dissemination and use of information provided by the In-Vehicle Signage service.
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2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 639-1, Codes for the representation of names of languages — Part 1: Alpha-2 code
ISO 3166-1, Codes for the representation of names of countries and their subdivisions — Part 1: Country codes
ISO 21217, Intelligent transport systems — Communications access for land mobiles (CALM) — Architecture
ISO/TS 14823, Traffic and travel information — Messages via media independent stationary dissemination
systems — Graphic data dictionary for pre-trip and in-trip information dissemination systems
ISO/TS 16951, Road vehicles — Ergonomic aspects of transport information and control systems (TICS) —
Procedures for determining priority of on-board messages presented to drivers
ISO/TS 17423, Intelligent transport systems — Cooperative systems — ITS application requirements and
objectives for selection of communication profiles
ISO/TS 17429, Intelligent transport systems — Cooperative systems — Profiles for processing and transfer
of information between ITS stations for applications related to transport infrastructure management,
control and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 21217, ISO/TS 17423,
ISO/TS 17429, and the following apply.
3.1
additional service
IVS service able to deal with the lower levels of message priority
3.2
communication authority
entity in charge of regulating telecommunications and/or broadcast services
3.3
core service
IVS service able to deal with the two highest levels of message priority
3.4
driver awareness zone
DAZ
parts of road network on which a message is present to inform drivers about upcoming situations
3.5
HMI control unit
in-vehicle device that manages prioritisation and presentation of messages designed for consumption
by vehicle occupants
3.6
in-vehicle signage
in-vehicle signage service
IVS
ITS service that provides receiving ITS stations in order to inform drivers about static as well as
dynamic road signs and variable message signs
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3.7
IVS application
ITS-S application process that instantiates the IVS service
3.8
IVS application service provider
application service provider
service provider
entity that executes the corresponding ITS service
Note 1 to entry: According to ISO/TS 17427, its role can be defined as collecting the content that is required to
run the IVS service, running the IVS service and providing a suitable service response.
3.9
IVS content service provider
content service provider
content provider
source of the in-vehicle signage (3.6) information
Note 1 to entry: According to ISO/TS 17427, its role can be defined as providing the information content for the
IVS service.
3.10
IVS message
message generated for the in-vehicle signage (3.6) ITS service as specified in this Technical Specification
3.11
IVS receiving ITS station
ITS station that receives and processes the IVS messages (3.10)
Note 1 to entry: It can be either a vehicle ITS-S or a personal ITS-S.
3.12
IVS sending ITS station
ITS station that generates and transmits the IVS messages (3.10)
Note 1 to entry: It can be either a central ITS-S or a roadside ITS-S.
3.13
minimum dissemination area
MDA
parts of the road network where the IVS message (3.10) can be received by the potentially targeted
vehicles
3.14
qualified information
information issued by authorised sources (road authorities, traffic managers) for their operated network
3.15
relevance zone
RZ
parts of the road network for which the IVS message (3.10) is valid
3.16
traffic manager
entity in charge of operating a road network and managing traffic
Note 1 to entry: For this Technical Specification, this entity is also considered as an enacting road authority;
although in some circumstances, these different activities can be operated by separate entities.
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3.17
validity end time
STO
time from which the IVS message (3.10) shall no longer be presented
3.18
validity start time
STA
time from which the IVS message (3.10) shall be presented
4 Symbols and abbreviated terms
ADU Application data unit
BSMD Bounded secured managed domain
C-ITS Cooperative intelligent transport systems
C-ITS-S Central ITS station
DAZ Driver awareness zone
DMB Digital multimedia broadcast
DMS Dynamic message sign
HMI Human machine interface
ICT Information and communication technologies
ITS Intelligent transport systems
ITS-S ITS station
ITS-SU ITS station unit
ITS-SCU ITS station communication unit
IVS In-Vehicle Signage
LDM Local dynamic map
MDA Minimum dissemination area
P-ITS-S Personal ITS station
R-ITS-S Roadside ITS station
RZ Relevance zone
STA Validity start time
STO Validity end time
TCC Traffic control centre
TMC Traffic management centre
NOTE 1 TCC and TMC are considered as synonyms and can be used one interchangeably. In the text below, TCC
will be used.
V-ITS-S Vehicle ITS station
VMS Variable message sign
NOTE 2 VMS and DMS are considered as synonyms and can be used interchangeably. In the text below, VMS
will be used.
5 Service definition and main concepts
5.1 General
The IVS service aims to provide information to road users from an authorized IVS content provider
presented in the vehicle in a manner that is consistent with that of VMS or road signs. This information
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is provided to drivers aiming to improve road safety, reduce environmental impact, and enhance
traffic flow.
NOTE 1 The information conveyed within an IVS message is the information that is available on fixed road
signs on roadside or on a VMS.
NOTE 2 In most circumstances, the IVS information is expected to be qualified by road authorities/operators,
in a consistent way with road authority’s/operator’s requirements, in the manner that is coherent with the
information that would be displayed on a road sign or a variable message sign (VMS).
Traffic information is presented automatically or at the request of the user.
Where possible, it is presented in the vehicle in a language chosen by the end-user.
NOTE 3 Such an ITS service is relevant when driving a terrestrial road vehicle but not for pedestrians. When
in this Technical Specification it is said of vehicle it does not imply the ITS service is only based on Vehicle ITS-
station. It may also be operated with a personal ITS-station present in a vehicle. In both cases, the information is
presented to the driver through an adapted HMI.
Figure 4 — Example of dynamic message display
Every IVS message presented from the In-Vehicle Signage service can depict either a road sign or a
variable message sign. Annex C provides some background information on road signage and Annex D
on VMS technologies.
The static information on static road signs and VMS is managed through catalogues. There are two
levels of pictogram catalogues:
a) the international level through the Convention on road signs and signals (also known as the Vienna
convention - UNECE) used in around 100 countries;
b) the national level (generally defined through regulations) (like e.g. in France: Regulation of 1967).
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NOTE 4 For countries having signed and ratified the Vienna convention, the national level is mainly based on
this convention and only presents minor differences with the convention content. There may also be some slight
differences regarding the used pictograms among countries for the same meaning.
NOTE 5 They allow independence between the content and its restitution. It needs to be updated when
necessary.
Within IVS, messages are being defined including a priority scheme for HMI usage within the IVS
service. Messages are being delivered to the HMI module, how the information is presented to the driver
is the responsibility of the equipment supplier. Information covered by the primary services should be
handled in the HMI with higher priority resulting in presentation to the driver in the driver awareness
zone at least once.
Overall priority cannot be determined by a single ITS service. This is dependent on the context and all
active ITS services inside the vehicle.
NOTE 6 The importance of high quality and safe HMI is recognized. However, as stated in Clause 1, HMI is
out of the scope of IVS. IVS will be one of the ITS services/ITS applications available in-vehicle. How these ITS
applications will work together in a harmonized manner is not specified in this Technical Specification.
5.2 Service definition
5.2.1 Definition
The In-Vehicle Signage ITS service supports the provision of information from an ITS-station to
another ITS-station concerning either static or dynamic information about traffic conditions and traffic
regulations. In countries where it is allowed, it can also include not directly traffic-relevant messages
that can be displayed on variable message signs. The information is provided by traffic managers or
authorized content providers to drivers seeking improved road safety, reduced environmental impact,
and enhanced traffic flow.
NOTE The information is provided via a central or roadside ITS-station to another ITS-station located in a
vehicle. Other schemes are possible such as messages hopping between ITS-stations in vehicles. This information
is available on fixed road signs or variable message signs (VMS) on the roadside or mounted above specific lanes.
5.2.2 Message categories
The “In-Vehicle Signage” ITS service implements the following two message categories that are
considered as part of service levels:
a) higher priority messages associated with core services (see 5.2.3);
b) lower priority messages associated with additional services (see 5.2.4).
5.2.3 Core services
The core services implement the following two message types:
a) Immediate danger warning message type: a warning alert concerning a danger involving drivers’
or other users’ safety.
NOTE 1 According to the UNO convention on traffic signs and signals (known as the Vienna convention),
such warning messages are provided using either triangle-shaped or diamond-shaped signs depending on
convention choices in specific countries.
NOTE 2 Typically on motorways or dual carriageway roads presentation of immediate danger warning
messages is given at this distance between 2 km and 5 km from the danger, this varies according to national
or regional rules. On other roads and in
...