SIST-TS CEN/TS 16157-4:2014

Intelligent transport systems - DATEX II data exchange specifications for traffic management and information - Part 4: Variable Message Sign (VMS) Publications

CEN/TS 16157-4 specifies and defines component facets supporting the exchange and shared use of data and information in the field of traffic and travel. The component facets include the framework and context for exchanges, the modelling approach, the data content, the data structure and relationships and the communications specification. This Technical Specification is applicable to: - Traffic and travel information which is of relevance to road networks (non urban and urban); - Public transport information that is of direct relevance to the use of a road network (e.g. road link via train or ferry service). This Technical Specification establishes specifications for data exchange between any two instances of the following actors: - Traffic Information Centres (TICs); - Traffic Control Centres (TCCs); - Service Providers (SPs). Use of this Technical Specification may be applicable for use by other actors. This Technical Specification includes the following types of information content: - Road traffic event information - planned and unplanned occurrences both on the road network and in the surrounding environment; - Operator initiated actions; - Road traffic measurement data, status data and travel time data; - Travel information relevant to road users, including weather and environmental information; - Road traffic management information and instructions relating to use of the road network. This part of the CEN/TS 16157 series specifies the informational structures, relationships, roles, attributes and associated data types required for publishing variable message sign information within the Datex II framework. This is specified in two parts, a DATEX II VMS Publication sub-model and a VMS Table Publication sub-model. The VMS Publication supports the exchange of the graphic and textual content of one or several VMS plus any status information on device configuration that aid the comprehension of the informational content. This content is potentially subject to rapid change. The VMS Table Publication supports the occasional exchange of tables containing generally static reference information about deployed VMS which enable subsequent efficient references to be made to pre-defined static information relating to those VMS. These publications are not intended to support the control or configuration of VMS equipment. Each is part of the DATEX II platform independent model.

Intelligente Transportsysteme - DATEX II Datenaustausch Spezifikationen für Verkehrsmanagement und Informationen - Teil 4: Variable Verkehrszeichen (VMS) Veröffentlichungen

Systèmes de transport intelligents - Spécifications Datex II d'échange de données pour la gestion du trafic et l'information routière - Partie 4 : Publication de VMS

La présente Spécification Technique (CEN/TS 16157) stipule et définit les composantes requises pour la prise en charge de l'échange et de l'utilisation partagée de données et d'informations aux voyageurs sur la circulation.
Ces composantes comprennent le cadre et le contexte des échanges, la démarche de modélisation, le contenu des données, leur structure et leurs relations ainsi que les spécifications de communication.
La présente Spécification Technique est applicable :
   aux informations aux voyageurs sur la circulation qui sont pertinentes pour les réseaux routiers (non urbains et urbains) ;
   aux informations sur les transports publics qui sont pertinentes pour l'utilisation d'un réseau routier (par exemple, les liaisons routières via les services ferroviaires et maritimes).
La présente Spécification Technique établit les spécifications d'échange de données ayant lieu entre deux des acteurs suivants :
   les centres d'information routière (CIR) ;
   les centres de contrôle du trafic (CCT) ;
   les fournisseurs de services (FS).
La présente Spécification Technique peut être utilisée par d'autres acteurs.
La présente Spécification Technique comprend les types de contenus d'informations suivants :
   les informations concernant les événements ayant trait au trafic routier - qu'ils aient lieu sur le réseau routier ou au niveau de l'environnement, qu'ils soient planifiés ou non ;
   les actions effectuées à l'initiative de l'opérateur ;
   les données de mesure et d'état du trafic routier et les données de temps de parcours ;
   les informations aux voyageurs pertinentes pour les usagers de la route, y compris les informations météorologiques et environnementales ;
   les informations de gestion du trafic routier et les conseils relatifs à l'utilisation du réseau routier.
La présente partie de la Spécification Technique CEN/TS 16157 spécifie les structures d'informations, les relations, les rôles, les attributs et les types de données associés requis pour la publication des informations des panneaux à messages variables dans le cadre de DATEX II. Ceci est spécifié en deux parties : un sous-modèle de Publication de VMS (panneaux à messages variables) DATEX II et un sous-modèle de Publication de tableaux de VMS.
La Publication de VMS prend en charge l'échange de contenus graphiques et textuels d'un ou de plusieurs VMS ainsi que les informations relatives à l'état de configuration des appareils qui facilitent la compréhension des contenus informationnels. Ce type de contenu est potentiellement soumis à des modifications rapides. La Publication de tableaux de VMS prend en charge l'échange occasionnel de tableaux contenant des informations de référence généralement statiques sur les VMS déployés, qui permettent, a posteriori, d'établir des références efficaces vers des informations statiques prédéfinies liées à ces VMS. Ces publications n'ont pas vocation à prendre en charge le contrôle ou la configuration des équipements des VMS. Chaque sous-modèle fait partie du modèle indépendant de la plate-forme de DATEX II.

Inteligentni transportni sistemi - Specifikacije za izmenjavo podatkov DATEX II pri upravljanju prometa in informiranju - 4. del: Objave spremenljivih prometnih znakov (VMS)

Standard CEN/TS 16157-4 določa in opredeljuje vidike v zvezi s komponentami, ki omogočajo izmenjavo in skupno uporabo podatkov ter informacij na področju prometa in potovanj. Vidiki v zvezi s komponentami vključuje ogrodje in kontekst za izmenjave, pristop z modeliranjem, vsebino podatkov, strukturo podatkov in odnose med njimi ter specifikacijo komunikacije. Ta tehnična specifikacija se uporablja za: - informacije o prometu in potovanju, ki so pomembne za cestna omrežja (na podeželju in v mestih); - informacije o javnem prevozu, ki so neposredno pomembne za uporabo cestnega omrežja (npr. cestna povezava prek železniške ali trajektne storitve). Ta tehnična specifikacija določa specifikacije za izmenjavo podatkov med katerima koli akterjema na naslednjem seznamu: - prometni informacijski centri (TIC); - prometni nadzorni centri (TCC); - ponudniki storitev (SP). To tehnično specifikacijo lahko uporabijo tudi drugi akterji. Ta tehnična specifikacija vključuje naslednje vrste informacijske vsebine: - informacije o dogajanju v cestnem prometu - načrtovani ali nenačrtovani dogodki na cestnem omrežju in v njegovi okolici; - dejanja, ki jih izvedejo izvajalci; - podatki o merjenju cestnega prometa, podatki o stanju in času potovanja; - podatki o potovanju, ki so pomembni za uporabnike cest, vključno z informacijami o vremenu in okolju; - informacije o upravljanju cestnega prometa in navodila za uporabo cestnega omrežja. Ta del iz skupine standardov CEN/TS 16157 določa strukture informacij, odnose, vloge, parametre in z njimi povezane podatkovne tipe, ki so potrebni za objavo spremenljivih prometnih znakov (VMS) v okviru Datex II. To je določeno v dveh delih: podmodelu DATEX II za objave VMS in podmodelu za objave tabel VMS. Objava VMS podpira izmenjavo grafične in besedilne vsebine prek enega ali več znakov VMS ter vseh informacij o stanju glede konfiguracije naprave, ki pripomorejo k razumevanju vsebine informacij. Ta vsebina se lahko hitro spreminja. Objava tabel VMS podpira občasno izmenjavo tabel, ki običajno vsebujejo statične referenčne informacije o uporabljenih spremenljivih prometnih znakih, ki omogočijo poznejše oblikovanje učinkovitih referenc za predhodno določene statične informacije o spremenljivih prometnih znakih. Te objave niso namenjene podpori nadzora ali konfiguraciji opreme VMS. Vsaka je del neodvisnega modela platforme DATEX II.

General Information

• Status: Withdrawn
• Publication Date: 03-Aug-2014
• Withdrawal Date: 12-Apr-2021
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ITC - Information technology
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 29-Mar-2021
• Due Date: 21-Apr-2021
• Completion Date: 13-Apr-2021
• Ref Project: CEN/TS 16157-4:2014 - Intelligent transport systems - DATEX II data exchange specifications for traffic management and information - Part 4: Variable Message Sign (VMS) Publications

Relations

• Replaced By: SIST EN 16157-4:2021 - Intelligent transport systems - DATEX II data exchange specifications for traffic management and information - Part 4: VMS publication
• Effective Date: 01-May-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CEN/TS 16157-4:2014
01-september-2014
Inteligentni transportni sistemi - Specifikacije za izmenjavo podatkov DATEX II pri
upravljanju prometa in informiranju - 4. del: Objave spremenljivih prometnih
znakov (VMS)
Intelligent transport systems - DATEX II data exchange specifications for traffic
management and information - Part 4: Variable Message Sign (VMS) Publications
Intelligente Transportsysteme - DATEX II Datenaustausch Spezifikationen für
Verkehrsmanagement und Informationen - Teil 4: Variable Verkehrszeichen (VMS)
Veröffentlichungen
Systèmes de transport intelligents - Spécifications Datex II d'échange de données pour
la gestion du trafic et l'information routière - Partie 4 : Publication de VMS
Ta slovenski standard je istoveten z: CEN/TS 16157-4:2014
ICS:
35.240.60 Uporabniške rešitve IT v IT applications in transport
transportu in trgovini and trade
SIST-TS CEN/TS 16157-4:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN/TS 16157-4:2014

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SIST-TS CEN/TS 16157-4:2014

TECHNICAL SPECIFICATION
CEN/TS 16157-4

SPÉCIFICATION TECHNIQUE

TECHNISCHE SPEZIFIKATION
April 2014
ICS 35.240.60
English Version
Intelligent transport systems - DATEX II data exchange
specifications for traffic management and information - Part 4:
Variable Message Sign (VMS) Publications
Systèmes de transport intelligents - Spécifications Datex II Intelligente Transportsysteme - DATEX II Datenaustausch
d'échange de données pour la gestion du trafic et Spezifikationen für Verkehrsmanagement und
l'information routière - Partie 4 : Publication de VMS Informationen - Teil 4: Variable Verkehrszeichen (VMS)
Veröffentlichungen
This Technical Specification (CEN/TS) was approved by CEN on 27 January 2014 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 16157-4:2014 E
worldwide for CEN national Members.

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Contents Pages
Foreword .3
Introduction .4
1 Scope .5
1.1 Conformance .5
2 Normative references .6
3 Terms and definitions .6
4 Symbols and abbreviated terms .7
5 UML notation .7
6 The VMS Publication model .7
6.1 Overview of the VMS Publication model .7
6.2 The Fault Package .8
6.3 The “VmsPublication” Package .9
6.4 The “VmsUnit” Package . 10
6.5 The “VmsMessage” Package . 14
7 The VMS Table Publication model . 17
7.1 Overview of the VMS Table Publication model . 17
7.2 The “VmsTablePublication” Package . 17
Annex A (normative) Data Dictionary . 21
A.1 Overview . 21
A.2 Data Dictionary for “VMS Publication” . 22
A.3 Data Dictionary of < < datatypes > > for “VMS Publication” . 39
A.4 Data Dictionary of < < enumerations > > for “VMS Publication” . 39
A.5 Data Dictionary for “VMS Table Publication” . 51
A.6 Data Dictionary of < < datatypes > > for “VMS Table Publication” . 58
A.7 Data Dictionary of < < enumerations > > for “VMS Table Publication”. 59
Annex B (normative) Referenced XML Schema for “VmsPublication” . 62
B.1 Overview . 62
B.2 Schema . 62
Annex C (normative) Referenced XML Schema for “VmsTablePublication” . 82
C.1 Overview . 82
C.2 Schema . 82
Annex D (informative) Examples of VMS Publications and VMS Table Publications In XML . 92
D.1 Example VmsPublication (text only) . 92
D.2 Example VmsPublication (text and pictogram) . 93
D.3 Example VmsPublication (text and sequencing pictograms) . 95
D.4 Example VmsTablePublication . 97
Bibliography . 103

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Foreword
This document (CEN/TS 16157-4:2014) has been prepared by Technical Committee CEN/TC 278 “Intelligent
transport systems”, the secretariat of which is held by NEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
CEN/TS 16157-4:2014 consists of the following parts, under the general title “Intelligent transport systems —
DATEX II data exchange specifications for traffic management and information”:
— Part 1: Context and framework
— Part 2: Location referencing
— Part 3: Situation publication
— Part 4: VMS publication
— Part 5: Measured and Elaborated Data Publications
The following parts are under preparation:
— Traffic view publication
— Communication specifications
Other parts may be developed in the future.
As a user of the standard, attention is drawn to the resources of www.datex2.eu < http://www.datex2.eu/>.
This website contains related software tools and software resources that aid the implementation of the
CEN/TS 16157 series DATEX II.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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Introduction
This Technical Specification defines a common set of data exchange specifications to support the vision of a
seamless interoperable exchange of traffic and travel information across boundaries, including national,
urban, interurban, road administrations, infrastructure providers and service providers. Standardization in this
context is a vital constituent to ensure that interoperability, reduction of risk, reduction of the cost base and
promotion of open marketplace objectives are achieved that will lead to many social, economic and
community benefits as a result of more informed travellers, network managers and transport operators.
Delivering European Transport Policy in line with the White Paper issued by the European Commission
requires co-ordination of traffic management and the development of seamless pan European services. With
the aim to support sustainable mobility in Europe, the European Commission has been supporting the
development of information exchange mainly between the actors of the road traffic management domain for a
number of years. In the road sector, DATEX II has been long in fruition, with the European Commission being
fundamental to its development through an initial contract and subsequent co-funding through the Euro-
Regional projects. With this standardization of DATEX II there is a real basis for common exchange between
the actors of the traffic and travel information sector.
This Technical Specification includes the framework and context for exchanges, the modelling approach, data
content, data structure and relationships and communications specification.
This Technical Specification supports a methodology that is extensible.
The fourth part of this Technical Specification deals with the publication of variable message sign (VMS)
information. It specifies the structures and definitions of information that may be exchanged to convey details
of the messages displayed on variable message signs, and the current configuration/characteristics and
status of the variable message signs that are currently deployed on the road network.
The European Committee for Standardization (CEN) draws attention to the fact that it is claimed that
compliance with this document may involve the use of a patent concerning procedures, methods and/or
formats given in this document.
CEN takes no position concerning the evidence, validity and scope of patent rights.
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1 Scope
This Technical Specification (CEN/TS 16157-4:2014) specifies and defines component facets supporting the
exchange and shared use of data and information in the field of traffic and travel.
The component facets include the framework and context for exchanges, the modelling approach, the data
content, the data structure and relationships and the communications specification.
This Technical Specification is applicable to:
— Traffic and travel information which is of relevance to road networks (non urban and urban);
— Public transport information that is of direct relevance to the use of a road network (e.g. road link via train
or ferry service).
This Technical Specification establishes specifications for data exchange between any two instances of the
following actors:
— Traffic Information Centres (TICs);
— Traffic Control Centres (TCCs);
— Service Providers (SPs).
Use of this Technical Specification may be applicable for use by other actors.
This Technical Specification includes the following types of information content:
— Road traffic event information – planned and unplanned occurrences both on the road network and in the
surrounding environment;
— Operator initiated actions;
— Road traffic measurement data, status data and travel time data;
— Travel information relevant to road users, including weather and environmental information;
— Road traffic management information and instructions relating to use of the road network.
This part of the CEN/TS 16157 series specifies the informational structures, relationships, roles, attributes and
associated data types required for publishing variable message sign information within the Datex II framework.
This is specified in two parts, a DATEX II VMS Publication sub-model and a VMS Table Publication sub-
model.
The VMS Publication supports the exchange of the graphic and textual content of one or several VMS plus
any status information on device configuration that aid the comprehension of the informational content. This
content is potentially subject to rapid change. The VMS Table Publication supports the occasional exchange
of tables containing generally static reference information about deployed VMS which enable subsequent
efficient references to be made to pre-defined static information relating to those VMS. These publications are
not intended to support the control or configuration of VMS equipment. Each is part of the DATEX II platform
independent model.
1.1 Conformance
The platform independent sub-models defined by this Part specify a DATEX II VMS Publication and a DATEX
II VMS Table Publication except for those elements that relate to location information which are specified in
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CEN/TS 16157-2. The DATEX II platform independent data model of which these two publication sub-models
are a part, corresponds to the Level A model as defined in CEN/TS 16157-1.
Conformance with this Part shall require platform independent models from which platform specific models are
generated to comply with the UML modelling rules defined in CEN/TS 16157-1 and with the following
requirements of the sub-models which are expressed in this Part:
— comply with all stipulated minimum and maximum multiplicity requirements for UML elements and
relationships;
— comply with all definitions, types and ordering;
— employ optional elements as specified;
— comply with all expressed constraints.
It should be noted that conformance of a publication service with all the structural requirements stated above
does not necessarily ensure that the informational content of that service will be semantically comprehensible.
2 Normative references
The following referenced documents are indispensable for the application 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.
CEN/TS 16157-1, Intelligent transport systems - DATEX II data exchange specifications for traffic
management and information - Part 1: Context and framework
CEN/TS 16157-2, Intelligent transport systems - DATEX II data exchange specifications for traffic
management and information - Part 2: Location referencing
CEN/TS 16157-3, Intelligent transport systems - DATEX II data exchange specifications for traffic
management and information - Part 3: Situation Publication
ISO 639-2:1998, Codes for the representation of names of languages — Part 2: Alpha-3 code
ISO/IEC 19501:2005, Information technology — Open Distributed Processing — Unified Modeling Language
(UML) Version 1.4.2
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CEN/TS 16157-1 and in the following list
shall apply.
4.1
legend
a sequence of text characters and/or symbols that is displayed on a variable message sign
4.2
location
identifiable geographic place
[EN ISO 19112:2005]
Note 1 to entry: It is either on a road network (as a point or a linear location) or as an area. This may be provided in
one or more referencing systems.
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4.3
pictogram
a representation of a graphic symbol displayed on a variable message sign by means of a (usually multi
colour capable) matrix or LED display panel
4.4
supplementary panel
an additional display panel, either physically separate or integrated with the main display panel which may
display information or regulatory instructions which are supplemental to the associated pictogram, comprising
either an additional line of text or a pictogram or both
4.5
variable message sign
VMSA sign/display panel used for the purpose of displaying one or more messages (comprising any
combination of textual, symbol or pictogram information) that may be changed or switched on or off as
required
4.6
variable message sign unit
a roadside unit which may control one or more variable message signs on a single gantry/mounting or on
closely associated separate gantries/mountings
4 Symbols and abbreviated terms
For the purposes of this document, the abbreviation of terms given in CEN/TS 16157-1 and in the following list
shall apply.
HTML Hyper Text Mark-up Language
IP Internet Protocol
RSS Really Simple Syndication
NOTE Comprises a Web feed format used to publish frequently updated sources of
information.
UML Unified Modelling Language
URL Uniform Resource Locator
VMS Variable Message Sign
5 UML notation
The UML notation used in these Technical Specifications shall be as described in ISO/IEC 19501. A short
summary explaining the notation used in this Technical Specification is provided in Annex A of
CEN/TS 16157-1.
6 The VMS Publication model
6.1 Overview of the VMS Publication model
The VMS Publication model shall comprise a top level package, “VmsPublication” and some sub-packages
from the “ReusableClasses” package. The “VmsPublication” top level package shall be one of a number which
shall be immediately subordinate to the “PayloadPublication” package and hence shall form the top of the
hierarchy in the VMS Publication sub-model.
The “VmsPublication” package shall make use of a subordinate “VmsUnit” package and a “VmsMessage”
package that together shall model the details of what is currently displayed on and the status of variable
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message signs. The “VmsUnit” and “VmsMessage” packages shall reside in the “VmsRelated” package which
is within the “ReusableClasses” package because they are also used in the “SituationPublication” package.
Each “VmsPublication” instance shall contain details of a number of individual deployed VMS units, each of
which may control one or more VMSs.
Some of the individual classes used within the “VmsPublication” package, principally those for modelling the
characteristics of a VMS, also reside in the “VmsRelated” package which is within the “ReusableClasses”
package as they are also used in the “VmsTablePublication” package”.
6.2 The Fault Package
6.2.1 Overview of the “VmsPublication” Package
The “Fault Package” is introduced to manage reusable classes to provide information related to fault for
equipment and devices. Classes related to Vms are Fault VmsFault and VmsUnitFault.

Figure 1 — The “Fault” package class model
6.2.2 Semantics of the “Fault” Package
6.2.2.1 “Fault” Class
Fault Class is defined in Fault package and is used to supply information about a fault relating to a specific
piece of equipment or process. It provides information about fault start time, fault identification and description
and severity. Fault may vary and update time is used to provide the period since the fault is unmodified. Fault
Class is specialized for VMS Unit and VMS.
Attribute “faultCreationTime” may be used to provide the time the fault has been reported or recorded
Attribute “faultDescription may be used to provide a natural language description of the fault
Attribute “faultIdentifier may be used to provide a unique identifier of the fault
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Attribute “faultLastUpdateTime may be used to provide the time the fault has been reported or recorded as
updated
Attribute “faultSeverity” may be used to provide the severity of the fault
6.2.2.2 “VmsUnitFault” Class
VmsUnitFault class is used to provide information of faults related to VMSUnit
Attribute “VmsFault” shall be used to provide the detail of the fault
6.2.2.3 “VmsFault” Class
VmsUnitFault class is used to provide information of faults related to VMS
Attribute “VmsFault” shall be used to provide the detail of the fault
6.3 The “VmsPublication” Package
6.3.1 Overview of the “VmsPublication” Package
The “VmsPublication” package shall be immediately subordinate to the “PayloadPublication” package and
shall comprise the sub-model for defining a publication which identifies the visual and textual content
displayed on individual VMSs and the status and settings of those VMSs, where each VMS is controlled by an
associated VMS unit (see Figure 2). The information shall be published in sets where each set relates to a
particular VMS unit which may control one or more VMSs.

Figure 2 — The “VmsPublication” package class model
6.3.2 Semantics of the “VmsPublication” Package
6.3.2.1 “VmsPublication” package semantics - general
The “VmsPublication” class shall be a specific realizable case of a “PayloadPublication”. Each
“VmsPublication” may contain any number of separate sets of information, each relating to a set of VMSs
which shall be controlled by the same VMS unit.
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The information relating to each VMS in the “VmsPublication shall specify the message/s that have actually
1
been set on the VMS at a specified time .
6.3.2.2 “VmsPublication” Class
The “VmsPublication” class shall be the base class for containing the published VMS information.
6.3.2.3 “HeaderInformation” Class
Each instance of a “VmsPublication” shall have associated metadata contained in an instance of the
“HeaderInformation” class which shall allow the supplier of the publication to specify how the recipient of the
“VmsPublication” should treat the information contained in it. For “HeaderInformation” class refer to
CEN/TS 16157-3.
6.4 The “VmsUnit” Package
6.4.1 Overview of the “VmsUnit” Package
The package, “VmsUnit”, shall comprise a sub-model for defining information about the settings, status, and
characteristics of VMS units and their component VMSs which are deployed on the road network (see Figure
3 — The “VmsUnit” package class model).
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Each VMS unit controls one or more VMSs, where a VMS may display one message or a sequence of
messages each comprising a combination of textual, symbol or pictogram information.
A VMS can display only one message at a time where each individual message shall comprise zero or one
text component and zero or more pictograms components (see Clause 6.5).


1 ) The information in the “VmsPublication” should relate to the current state of VMSs deployed on the road,
and not to any state information at the control centre, such as “pending” or “queued” or to any prioritized lists
of messages which may be displayed at some point in the future.

2) Variable Message Sign (VMS) units are mostly static installations but some may be mobile changing their
locations from time to time. Matrix signs used by some countries are classed in DATEX II as a simple type of
VMS with limited display capabilities.

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SIST-TS CEN/TS 16157-4:2014
CEN/TS 16157-4:2014 (E)

Figure 3 — The “VmsUnit” package class model
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SIST-TS CEN/TS 16157-4:2014
CEN/TS 16157-4:2014 (E)
6.4.2 Semantics of the “VmsUnit” Package
6.4.2.1 “VmsUnit” package semantics - general
The “VmsUnit” package shall comprise a “VmsUnit” class which has one or more indexed components where
each component shall model the details of an individual VMS that is controlled by the VMS unit.
The static characteristics of each VMS shall be identified by using an indexed reference into a specified record
in a “VmsUnitTable” published in a “VmsTablePublication” (see Clause 7). Alternatively where a VMS’s
characteristics are more dynamic these may be given directly in this publication which, if provided, shall
override any static characteristics defined in the referenced record in the “VmsUnitTable”. The “VmsUnit” class
shall be a specialization of the “VmsSetting” class which may be used in a Situation Publication to provide
details of VMSs which are set as a direct result of the situation that is defined in the “SituationPublication” (see
CEN/TS 16157-3, 7.23).
6.4.2.2 “VmsUnit” Class
An instance of the “VmsUnit” class shall represent a single VMS control unit at the roadside which may control
one or more VMS. It shall be possible to associate fault information with each “VmsUnit” class instance via the
“VmsFault” class.
Each VMS controlled by a VMS unit is referenced by its “vmsIndex” qualifier. The “vmsIndex” qualifier
provides an index into the specific “VmsRecord” within the relevant “VmsUnitRecord” (see
VmsTablePublication in Clause 7) from where the static VMS characteristics that are relevant for the VMS can
be obtained. These VmsUnitRecords are contained in a referenced VmsUnitTable that is published in a
VmsTablePublication.
— Attribute “vmsUnitTableReference” shall be used to provide a reference to an instance of a
“VmsUnitTable” that is published in a “VmsTablePublication” which contains a set of VMS unit records
where each record holds details of the characteristics and configuration data relating to a VMS unit and
its controlled VMSs. This reference shall point to the relevant table which holds the record containing the
details for this VMS unit.
— Attribute “vmsUnitReference” shall be used to provide a reference to an instance of a
“VmsUnitRecord” within the referenced “VmsUnitTable” that is published in a “VmsTablePublication”. The
“VmsUnitRecord” shall contain the relevant characteristics and configuration details relating to this VMS
unit and its controlled VMSs.
6.4.2.3 “VmsUnitFault” Class
An instance of the “VmsUnitFault” class shall allow a supplier of information via a DATEX II interface to
provide fault information relating to a variable message sign control unit. More than one type of fault may exist
at the same time. Each instance of a “VmsUnitFault” inherits fault details from the “Fault” class which, at a
minimum, shall contain the time that the fault information was last updated.
6.4.2.4 “Vms” Class
An instance of the “Vms” class shall represent a single VMS and shall allow a supplier of information via a
DATEX II interface to define what textual legend and pictograms are being displayed, its dynamic
characteristics/configuration and any current fault status of the VMS.
A VMS may be set to display a sequence of messages in a defined order where each message comprises a
combination of text pages and pictograms. In this case the “messageIndex” qualifier shall be used to
distinguish the individual messages and their order of display.
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