actual data stream containing content as defined by an application

open and independent association of information publishers and receivers who have an interest in exchanging travel information using an agreed set of principles

is the mode of operation of the vehicle equipment in which the guidance information comprises the compass ("crow-fly") direction and distance to the chosen destination; this can be derived from the vehicle current position and the co-ordinates of the destination; the vehicle unit may be in either Autonomous Mode or Guided Mode of operation; usually the Autonomous Mode occurs before reaching the first beacon and after reaching the Departure Point for the destination

several traffic measurements (such as queuing time, number of stops etc.) are assigned to a measurement point; these measurements are taken between the last and the actual measurement point; at least a measurement point is defined at the end of each link by default, but it is possible to define additional measurement points at the end of the vectors the link is build with

is the point on the link chain near to the destination at which guidance is switched back to autonomous mode in vehicle system to direct drivers to their destination

location table which is different from the default location table used by the transmitter

the time accumulated between two measurement points while the vehicle travelled below a predefined queue speed limit

these are closed polygons of any type (except concave) with 7 corners maximum within a beacon region; individual destinations within a zone are considered to have the same destination by the system thereby reducing significantly the possible number of destinations and the guidance information necessary; zones can be of any size to suit the terminal guidance accuracy required and large zones can be sub-divided if required

number with the value 0 to 63 used to identify the Location Table used by the service provider.

NOTE 1 The LTN is generally allocated to each service provider in a country by the relevant government or roads authority from a range assigned to that country. It is transmitted in type 3A groups.

NOTE 2 Value 0, when transmitted in type 3A groups, shows that the service provider is encrypting the location codes.

serial number to distinguish successive messages having a particular message identifier

NOTE Version numbers are used incrementally, allowing the progress of an event to be tracked from first notification (VER = 0), through updates, to eventual cancellation (VER = 255).

digital message exchanged between two systems

date and time stamp in accordance with ISO 8601 originated at the actual time and point of message generation

NOTE Used for message management purposes.

date determined by the service provider on which a particular terminal’s ability to decrypt an encrypted service should cease (i.e. end of the paid subscription period)

a combination of several elements to allow making full use of media links, back channels and to facilitate the description of less common occurrences and allow the listing of emergency numbers; for the full use it needs Function Types as they are defined in TPEG table pti30

all information needed to filter, select and process a location in only text-based systems

NOTE Information referenced through hierarchically structured text.

one of the TTI System operators; each TIC is connected to TMC, PIC, PTC and some other TICs to collect and process information generated at each of the said centres; the TIC disseminates information periodically in accordance with procedures as agreed with the corresponding VASP or from time to time on request from the VASP

an occurrence on a road or in an area that is worthy of reporting, such as a traffic jam, wrong-way driver, or fog

amount of disruption to traffic likely to be caused by a particular event

NOTE This definition varies from the DATEX Data Dictionary definition (ENV 13106).

the message transmitted by an onboard unit (OBU) to the FCD server

motorways

TS-GST optional table that indicates the operation times of selected service components

these are the corner points represented by geographical coordinates, which identify the destination zones and areas

identification that indicates how to process TPEG content and routes information to the appropriate application decoder

NOTE 1 to entry: Each TPEG application has a unique number, which identifies the application according to Clause 5 of ISO TS 18234-7. The application identification is part of the TPEG specification and is defined as and when new applications are developed.

is the information transmitted by the beacon which describes the network in the beacon region and allows the vehicle to track its position as it moves in the network

IE a functional category of road traffic signs and pictograms performing broadly similar functions

designed such that any modification of the electronically stored information, without proper authorization, is not possible

notation appended in drawings, where necessary, to indicate that the code being transmitted [e.g. SID (ON)] relates not to the Tuned Service, but to a referenced Other Network

NOTE Data about the Other Network(s) can be pre-stored in terminal equipment.

number given in confidence by a service provider to a terminal manufacturer, identifying which one of eight possible encryption tables the service is using for encryption

NOTE The Service Key is NOT transmitted.

assigns a code to each country

NOTE 1 to entry: Country codes are not unique to one country and can be repeated in non-neighbouring countries.

NOTE 2 to entry: In RDS, The Country Code is transmitted in the first 4-bits of the PI code to signal the origin of the audio programme, which may be different to the country where the transmitter is located.

NOTE 3 to entry: Defined in the RDS specification IEC 62106.

first four bits of the Programme Identifier are identical with Country Code if the RDS specification IEC 62106 is implemented

NOTE 1 to entry: The CC is signalled in the RDS PI Code for purposes of identifying the country of origin of the audio programme.

NOTE 2 to entry: Usually the Programme Identifier Country Code and the Location Table Country Code on an RDS-TMC transmission have the same value, but not always nor necessarily.

“channel” within the multiplex of a TPEG stream with each stream comprising a number of these “channels” which are identified by the component identifier in ISO/TS 18234-2 (TPEG-SSF) and linked to the COID and AID in the TPEG-SNI application

NOTE 1 to entry: Each service component carries an application instance service identification.

end time of a traffic event

enables a RDS-TMC terminal to change from one transmitter to another at boundaries of a particular transmitter's coverage

NOTE 1 to entry: Each transmitter should direct the RDS-TMC terminal to specific frequencies or TMC services in adjacent areas.

significant points on the route

simple form of guidance to destination, in which the direction and straight-line distance of the destination are indicated

beginning time of a traffic event

indicates the area, road segment or point location where the source of the problem is situated

position defines where an event has taken place in relation to the road: e.g. driving lane 1, hard shoulder, central reservation, etc.

NOTE The driving lanes are numbered according to the usual local practice, i.e. driving Lane 1 is the lane nearest to the hard shoulder. In countries which drive on the left, driving lanes are hence numbered from left-to-right, and in countries driving on the right, from right-to-left.

NOTE Position is an event element and NOT a location reference element.

CD-GST optional table that gives the textual descriptions of selected service components

ACP a particular service and subscription period

location reference using a unique identifier that is agreed upon in both sender and receiver system to select a location from a set of pre-coded locations

assigns a unique code to each country

NOTE 1 to entry: The combination of ECC and CC algother assigns a unique code for each country.

NOTE 2 to entry: Defined in the RDS specification IEC 62106.

FT-GST directory of the applications and content of the service that indicates in which components the relevant information can be found

NOTE 1 to entry: This contains the minimum set of information required for the acquisition of application data.

identifies the adjacent segments or specific point locations also affected by the incident, and where appropriate the direction of traffic affected

enables an RDS-TMC terminal to decode and evaluate essential data, which describes the transmission being received

NOTE 1 to entry: System Information indicates an RDS-TMC service and comprises some service characteristics needed to select the RDS-TMC service.

provides the user interfaces with the TMC service

NOTE 1 to entry: Their functionality may cover a range of terminal functions from simple terminals with a limited message repertoire and restricted location database to more sophisticated terminals offering full TMC message features and/or a wide range of strategic and tactical location databases.

native TPEG location referencing method focused on providing location references for various TPEG applications, which are designed for delivering messages to end-users

NOTE 1 Since TPEG-LOC is designed for delivering messages to end-users, some definitions have a meaning which is different from that found in other location referencing systems.

NOTE 2 An important aspect of the TPEG-LOC referencing method is that a location description may be created on-the-fly by the service provider when needed. It may then be interpreted and used by the TPEG-decoder, and then discarded. The pre-creation of codes and the use of a database and code maintenance is entirely avoided.

specific form of traffic events which being safety-related messages are sent with high priority to assist a driver from encountering dangerous situations

an EBU document publishing number system

in TPEG-Loc, a location container is a concept applied to the location referencing elements, to show how they are grouped together

NOTE The TPEG-Loc container comprises a default language code, a location co-ordinates container and an additional location descriptions container.

describes an event or a collection of related events, or status information and including message management information; the latter is contained in the message header