Abbreviations

Results for area 4.1 Data

term
Alternative Frequency (an RDS feature) (AF)
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term
intersection point (IP)
definition

point at the intersection of two roads; the given co-ordinate is accompanied by up to three road descriptors to match it exactly on the map

term
route description point
definition

TPEG-locs with additional flags to indicate whether they are start, end and stopping as well as non-stopping points; they are listed in TPEG table pti15

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term
departure point
definition

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

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bypass link
definition

prominent waypoints on a Bypass Route

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term
destination area
definition

the combination of one or more destination zones which have the same RGI; destination areas are described with boundary lines and exist only in the outer regions

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term
destination zone
definition

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

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term
foreign location table (FLT)
definition

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

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term
cyclic redundancy check (CRC)
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term
queuing time
definition

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

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term
message expiry time (MET)
definition

date and time in accordance with ISO 8601 when the message should be deleted from all TPEG-decoders

NOTE Used for message management purposes.

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term
interval time (IVT)
definition

allows the description of repeated events within a certain time frame, such as running a special service but only for a limited period; for example an additional service may be added for a period of three weeks, but it only runs on Tuesdays and Thursdays, so the STA and STO will mark the period, but IVT will be needed to clarify the addition applies to specific days

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term
location table number (LTN)
definition

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.

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term
location table number before encryption (LTNBE)
definition

number with the value 1 to 63 used to identify the Location Table used by the service provider prior to the codes within the table being encrypted for transmission

NOTE LTNBE is transmitted in type 8A groups.

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term
version number (VER)
definition

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).

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term
floating car data (FCD)
definition

measured data which are collected in floating cards on a certain time cycle and which contain data on the trip profile and derived quantities

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term
message generation time (MGT)
definition

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.

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term
length of a speech report
definition

length of a Speech Report, including pauses, in tenths of a second

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term
expiry date
definition

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)

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term
duration
definition

gives an indication of how long the problem is expected to last

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term
Diversion Advice
definition

shows whether or not end-users are recommended to find and follow an alternative route

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term
message report type
definition

element to signal the type of message for presentation purposes

NOTE It may be an incident message report, station/terminal information, route information or individual service information, as defined in TPEG table pti27.

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term
severity factor (SEV)
definition

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).

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term
geocode
definition

geocodes are unique identifiers unmistakably defining important points on road networks; geocodes can be derived from /converted into WGS 84 co-ordinates by the algorithm described in CEN/TS 14821-3

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term
Clock Time - an RDS feature (CT)
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term
Tag length value (TLV)
definition

a coding method

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term
corner point
definition

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

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boundary line
definition

the border between two destination areas

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term
application identification (AID)
definition

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.

term
Programme Identifier
definition

assigns a unique value to each audio programme source

NOTE 1 to entry: Defined in the RDS specification IEC 62106.

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term
Service Identifier (SID)
definition

SID Code uniquely identifying a TMC service provided by a service provider

term
Country Identifier (CID)
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term
Alternative Frequency Information (an RDS-TMC feature) (AFI)
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term
Conditional Access Information (CAI)
term
information element
definition

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

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term
Other Network (an RDS feature) (ON)
definition

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.

term
Country name (CNAME)
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term
service key (SVK)
definition

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.

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term
PIN code
definition

numeric or alphanumeric code required to be entered into a terminal before that terminal is permitted to present decrypted RDS-TMC messages

NOTE The value of the PIN code is calculated by the terminal manufacturer from an algorithm using terminal serial number and one or more application profiles as factors.

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term
Location Code (LC)
definition

numeric or alphanumeric representation of a location according to a pre-determined database, known as a Location Table

term
Country Code (CCD)
definition

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.

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term
Programme Identifier Country Code (PICC)
definition

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.

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Location Table Country Code (LTCC)
definition

assigns a code to each location table, based on the country of origin of the locations referenced in this table

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Tuning Information
definition

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.

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term
waypoint
definition

significant points on the route

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term
Tuned Network (TN)
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term
queue speed limit
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term
Continuity Index Field
definition

helps distinguish between different multi-group messages

NOTE 1 to entry: All groups within any particular multi-group message contain the same value of this continuity index.

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term
Message Geographical Scope (MGS)
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term
startTime
definition

beginning time of a traffic event

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term
radius of expansion
definition

in TPEG-Loc, a radius of expansion is described by a circle of a certain radius value around a fixed point

term
Extended Country Code (ECC)
definition

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.

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term
Location Table Extended Country Code (LTECC)
definition

assigns a code to each location table, based on the country of origin of the locations referenced in this table

NOTE 1 to entry: Together the LTECC, LTCC and LTN identify a location database uniquely.

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term
direction and extent
definition

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

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