ISO/TS 17425:2016
(Main)Intelligent transport systems — Cooperative systems — Data exchange specification for in-vehicle presentation of external road and traffic related data
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
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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 2016
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved
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
Foreword
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The committee responsible for this document is ISO/TC 204, Intelligent transport systems.
iv © ISO 2016 – All rights reserved
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).
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
...
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