CEN/TC 278/WG 8 - Road traffic data (RTD)

This document, based on ISO/TS 19468, specifies a platform-specific method for implementing data exchange among centres based on simple object access protocol (SOAP), supporting the EN 16157 series (DATEX II) for Push/Pull data delivery and service request/feedback collaborative intelligent transport system (ITS) services.
This document defines the message rules and procedures for communication between transport information and control systems using XML (Profile B).
This document clarifies how to package end-application messages and relevant data.
The payload data definition used in specific end-applications and the exact structure of the content payload delivered in the messages are beyond the scope of this document.
Rules and procedures for exchanging data-packets in lower communication layers are also out of the scope of this document. These functionalities can be implemented using generic protocols defined in the industry standards. However, this document does define how to use these protocols.

This new work item will revise and extend the sixth part of the DATEX II Technical Specifications which defines three DATEX II parking-related publications and a truck parking profile and that supports the exchange of static as well as dynamic information about parking facilities and areas, including intelligent truck parking as defined by the Directive 2010/40/EU priority action e as well as urban parking as specified in action a.
The formerly used Level B extension will be replaced by a new namespace in the context of version 3.0 of DATEX II.
The publications are intended to support the exchange of informational content from the organisation performing measurements and collecting/eliciting basic data to other organisations providing ITS services or onward information exchange. It is the ambition to harmonise existing information models from different sources such as EasyWay deployment guidelines and truck parking initiatives, and to liaise with the stakeholders involved, especially with the Alliance for Parking Data Standards and CEN/TC 278 working group 3.

This document 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, data content, data structure and relationships.
This document 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) ;
—   Traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This document 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 document may be applicable for other actors.
This document series covers, at least, the following types of informational 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 CEN/TS 16157 specifies the informational structures, relationships, association ends, attributes and associated data types required for publishing information about facilities within the DATEX II framework. This is specified as a DATEX II "Facilities" namespace, which is part of the DATEX II platform independent model, but this Part excludes those elements that are specified in EN 16157-2 (Location referencing) and EN 16157-7 (Common data elements).

This document specifies a publication sub-model within the DATEX II model that supports the publication of electronic traffic regulations.
This publication is intended to support the exchange of informational content from road traffic authorities issuing traffic regulation orders and organisations implementing these orders to other organisations providing ITS services or onward information exchange.

The EN 16157 series 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, data content, data structure and relationships.
The EN 16157 series 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);
- traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This series 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 series can be applicable for use by other actors.
This series covers, at least, the following types of informational 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 details of infrastructure for vehicle energy supply. The provided data model is separated into two publications for static and dynamic information. The static information regarding the infrastructure is not subject to frequent changes, whereas the dynamic part offers the ability to provide highly up-to-date information. The static part covers all relevant information on vehicle energy infrastructure, e.g. sites, stations and refill points for electric vehicles as well as petrol, gasoline or gas-based refuelling for vehicles. In terms of dynamic information, the availability of the infrastructure, possible faults and a price indication are covered.

This document defines and specifies component facets supporting the exchange and shared usage of data and information in the field of traffic and travel.
The component facets include the framework and context for exchanges, the data content, structure and relationships necessary and the communications specifications, in such a way that they are independent from any defined technical platform.
This document establishes specifications for data exchange between any two instances of the following actors:
—    Traffic information centres (TICs);
—    Traffic control centres/Traffic management centres (TCCs/TMCs);
—    Service providers (SPs).
This document can also be applied for use by other actors, e.g. car park operators.
This document includes the following types of information:
—   use cases and associated requirements, and features relative to different exchange situations;
—   different functional exchange profiles;
—   abstract elements for protocols;
—   data model for exchange (informational structures, relationships, roles, attributes and associated data types required).
In order to set up a new technical exchange framework, it is necessary to associate one functional exchange profile with a technical platform providing an interoperability domain where plug-and-play interoperability at a technical level can be expected. The definition of such interoperability domains is out of scope of this document but can be found in other International Standards or Technical Specifications (e.g. the ISO 14827 series).
This document is restricted to data exchange. Definition of payload content models is out of the scope of this document.

This European Standard (EN 16157 series) 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, data content, data structure and relationships.
This European Standard 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),
-   Traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This European Standard 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 European Standard may be applicable for use by other actors.
This European Standard series covers, at least, the following types of informational 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 publications, a DATEX II VMS Table Publication sub-model and a VMS Publication sub-model, which are part of the DATEX II platform independent model, but this part excludes those elements that relate to:
-   location information which are specified in EN 16157-2,
-   common information elements, which are specified in EN 16157-7,
-   situation information which are specified in EN 16157-3.
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. 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.
These publications are not intended to support the control or configuration of VMS equipment. Each is part of the DATEX II platform independent model.

This document is the fifth part of the DATEX II European Standard which deals with the publication sub-models within the DATEX II model that support the exchange of measured and elaborated information.
These publications are intended to support the exchange of informational content from the organization having the measured data and creating elaborated data to other organisations providing ITS services or onward information exchange. It also includes the exchange of static information about measurement sites.
This is specified in three sub-models, a DATEX II Measurement Site Table Publication sub-model, a DATEX II Measured Data Publication sub-model and a DATEX II Elaborated Data Publication sub-model.

This European Standard series (EN 16157) 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, data content, data structure and relationships.
This European Standard series 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),
-   traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This European Standard series 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 European Standard series may be applicable for use by other actors.
This European Standard series covers, at least, the following types of informational 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 EN 16157 series specifies the informational structures, relationships, roles, attributes and associated data types, for the implementation of the location referencing systems used in association with the different publications defined in the Datex II framework. It also defines a DATEX II publication for exchanging predefined locations. This is part of the DATEX II platform independent data model.

This document specifies and defines components required to support the exchange and shared use of data and information in the field of traffic and travel.
The components include the framework and context for the modelling approach, data content, data structure and relationships.
This document 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),
-   traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This document 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 document can be applicable for use by other actors.
This document covers, at least, the following types of informational content:
-   road traffic event information - planned and unplanned occurrences both on the road network and in the surrounding environment,
-   information about operator-initiated actions - including both advisory and mandatory measures,
-   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 information and advice relating to use of the road network.
This part of EN 16157 specifies the DATEX II framework of all parts of this European Standard, the context of use and the modelling approach taken and used throughout this European Standard. This approach is described using formal methods and provides the mandatory reference framework for all other parts.

This document 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, data content, data structure and relationships.
This document 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),
-   traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This document 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 document can be applicable for use by other actors.
This document covers, at least, the following types of informational 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 document specifies the informational structures, relationships, roles, attributes and associated data types required for publishing situation traffic and travel information within the DATEX II framework. This is specified as a DATEX II Situation Publication sub-model which is part of the DATEX II platform independent model, but this part excludes those elements that relate to:
-   location information which are specified in FprEN 16157 2;
-   common information elements, which are specified in EN 16157 7.

This document specifies and defines component facets required to support 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 data content, data structure and relationships, communications specification.
This document 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),
-   traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This document 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 document can be applicable for use by other actors.
This document covers, at least, the following types of informational content:
-   road traffic event information - planned and unplanned occurrences both on the road network and in the surrounding environment,
-   information about operator initiated actions - including both advisory and mandatory measures,
-   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 information and advice relating to use of the road network.
This part of EN 16157 specifies common informational structures, relationships, roles, attributes and associated data types required for publishing information within the DATEX II framework. This is specified as a DATEX II sub-model which is part of the DATEX II platform independent model, but this part only covers common elements that are used by more than one publication. It excludes those elements that relate to location information which are specified in FprEN 16157 2.

This document specifies and defines components required to support the exchange and shared use of data and information in the field of traffic and travel.
The components include the framework and context for the modelling approach, data content, data structure and relationships.
This document 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).
•   Traffic and travel information in the case of Cooperative intelligent transport systems (C-ITS).
This document establishes specifications for data content to be exchanged between any two instances of the following actors:
•   Traffic Information Centres (TICs),
•   Traffic Control Centres (TCCs),
•   Service Providers (SPs),
Use of this document may be applicable for use by other actors.
This part of EN 16157 specifies the DATEX II framework of all parts of this European Standard, the context of use and the modelling approach taken and used throughout these European Standards. This approach is described using formal methods and provides the mandatory reference framework for all other parts

Part 8 specifies additional data model structures that are applicable for traffic management applications in general and the urban environment in particular. It addresses data concepts to support the exchange of traffic management plans, rerouting, extensions of the existing DATEX II core model for this purpose in combination with additions to better support application into the urban environment.
It establishes specifications for data exchange between any two instances of the following actors:
-   Traffic Control Centres (TCCs),
-   Traffic Information Centres (TICs),
-   Service Providers (SPs).

ISO 14825:2011 specifies the conceptual and logical data model and physical encoding formats for geographic databases for Intelligent Transport Systems (ITS) applications and services. It includes a specification of potential contents of such databases (data dictionaries for Features, Attributes and Relationships), a specification of how these contents shall be represented, and of how relevant information about the database itself can be specified (metadata).
The focus of ISO 14825:2011 is on ITS applications and services and it emphasizes road and road-related information. ITS applications and services, however, also require information in addition to road and road-related information.
Typical ITS applications and services targeted by ISO 14825:2011 are in-vehicle or portable navigation systems, traffic management centres, or services linked with road management systems, including the public transport systems.

This new work item will produce the sixth part of the DATEX II Technical Specifications which deals with a DATEX II Level B extension (two publications and a Truck Parking profile) that supports the exchange of static as well as dynamic information about parking facilities and  areas, including intelligent truck parking as defined by the directive 2010/40/EU priority actions e and f. The publications are intended to support the exchange of informational content from the organisation performing measurements and collecting/eliciting basic data to other organisations providing ITS services or onward information exchange. It is the ambition to harmonise existing information models from different sources such as EasyWay deployment guidelines, In-Time CAI and Truck Parking initiatives, and to liaise with the stakeholders involved.

This document defines and specifies 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 data content, structure and relationships necessary and the communications specification, in such a way that they are independent from any defined technical platform.
This document establishes specifications for data exchange between any two instances of the following actors:
— Traffic Information Centres (TIC);
— Traffic Control Centres/Traffic Management Centres (TCC/TMC);
— Service Providers (SP).
This document can be applied for use by other actors, e.g. car park operators.
This document includes the following types of information:
— the use cases and associated requirements, and features relative to different exchange situations;
— the different functional exchange profiles;
— the abstract elements for protocols;
— the data model for exchange (informational structures, relationships, roles, attributes and associated data types required).
In order to set up a new technical exchange framework, it is necessary to associate one functional exchange profile with a technical platform providing an interoperability domain where plug-and-play interoperability at technical level can be expected. The definition of such interoperability domains is not part of this document but can be found in other standards or technical specifications, e.g. ISO 14827‑3. This document is restricted to data exchange. Definition of payload content models is beyond the scope of this document.

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.

This Technical Specification (CEN/TS 16157-5) 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 measured and elaborated data within the Datex II framework. This is specified in three submodels, a DATEX II Measurement Site Table Publication submodel, a DATEX II Measured Data Publication submodel and a DATEX II Elaborated Data Publication submodel.

This Technical Specification (CEN/TS 16157-2) 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, data content, data structure and relationships, 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 covers, at least, the following types of informational 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 specifies the informational structures, relationships, roles, attributes and associated data types, for the implementation of the location referencing systems used in association with the different publications defined in the Datex II framework. It also defines a DATEX II publication for exchanging predefined locations. This is part of the DATEX II platform independent data model.

This Technical Specification (CEN/TS 16157-1) specifies and defines component facets required to support 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, data content, data structure and relationships, 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 covers, at least, the following types of informational 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 information and advice relating to use of the road network.
This part of CEN/TS 16157 specifies the DATEX II framework of all parts of this Technical Specification, the context of use and the modelling approach taken and used throughout these Technical Specifications. This approach is described using formal methods and provides the mandatory reference framework for all other parts.

This Technical Specification (CEN/TS 16157-3) 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 specifies the informational structures, relationships, roles, attributes and associated data types required for publishing situation traffic and travel information within the DATEX II framework.  This is specified as a DATEX II Situation Publication sub-model which is part of the DATEX II platform independent model, but this Part excludes those elements that relate to location information which are specified in CEN/TS 16157-2 and those elements that relate to VMS settings which are specified in Part 4 of CEN/TS 16157 [4].

ISO 14825:2004 specifies the conceptual and logical data model and the exchange format for geographic data bases for Intelligent Transportation System (ITS) applications. It includes a specification of potential contents of such data bases (features, attributes and relationships), a specification of how these contents shall be represented, and of how relevant information about the database itself can be specified (metadata).
The focus of this International Standard is on ITS applications and it emphasizes road and road-related information. ITS applications, however, also require information in addition to road and road-related information.
EXAMPLE 1 ITS applications need information about addressing systems in order to specify locations and/or destinations. Consequently, information about the administrative and postal subdivisions of an area is essential.
EXAMPLE 2 Map display is an important component of ITS applications. For proper map display, the inclusion of contextual information such as land and water cover is essential.
EXAMPLE 3 Point-of-Interest (POI) or service information is a key feature of traveller information. It adds value to end-user ITS applications.

This standard defines terms used for data and information in the fields of traffic and travel. The standard is applicable to traffic and transport engineering in general, and particularly data and information exchange. This ENV supersedes ENV 13106-1:1998. The normative terminology is provided in tables 1 to 3. Table 1 provides general definitions; it is normative. Table 2 lists the entities and their instances; it is normative. Table 3 lists the attributes with their definitions, values, units, data type, field width and default format.

This standard defines the methodology, functions and message structures for the exchange of data between traffic and travel information centres. The normative and informative clauses of the draft have been identified but due to the complexity of the document and cross-referencing the normative and information clauses have not been separated.