Abbreviations

Results for area 7 Road Traffic Data

term
destination
definition

specification of the end point of a defined route or itinerary

NOTE This may be either a location on a network or an area location.

term
longitude; geodetic longitude
definition

geodetic longitude angle from the prime meridian plane to the meridian plane of a given point, eastward treated as positive

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term
ILOC descriptor
definition

one of the three descriptors associated to an ILOC reference

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supplementary panel
definition

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

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term
European terrestrial reference system 89 (ETRS89)
definition

recommended terrestrial reference system for Europe and coincident with ITRS at the epoch 1989

NOTE Unlike ITRS, ETRS is centred on the stable part of the European plate and not subject to change due to continental drift in most of Europe.

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term
geodetic coordinate
definition

one of the sequences of two (or three) numbers designating the position of a point, expressed in geodetic latitude, geodetic longitude and (in the three-dimensional case) ellipsoidal height

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Passenger Car Unit (PCU)
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term
legend
definition

a sequence of text characters and/or symbols that is displayed on a variable message sign

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term
linear referencing
definition

specification of a location relative to a linear element as a measurement along that element

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term
measurement
definition

collection of quantitative data

NOTE 1 to entry: A measurement is made by comparing a quantity with a standard unit. Since this comparison cannot be perfect, measurements inherently include error.

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term
Site Measurements
definition

that supports electromagnetic, optical, or acoustical transmissions

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term
international terrestrial reference system (ITRS)
definition

reference system for the earth derived from precise and accurate space geodesy measurements, not restricted to GPS Doppler measurements, which is periodically tracked and revised by the International Earth Rotation Service (I.E.R.S.)

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term
measurement site
definition

location from where a stream of measured data may be derived

NOTE 1 to entry: It can be a point, a linear road section or an area. Linear sections may even be specified as itineraries or predefined location sets, e.g. for travel time routes which comprise one or more different roads.

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term
location
definition

identifiable geographic place

NOTE It is either on a network (as a point or a linear location) or an area. This may be provided in one or more referencing systems.

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measured data
definition

quantitative data measured against a quantified scale (possibly using standard units of measure)

NOTE 1 to entry: In comparison to Elaborated Data, measured data can be considered to represent presentation of more directly observed measurements

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pictogram
definition

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

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term
platform independent model (PIM)
definition

model of aspects of an information system (e.g. the data model) that is independent of any technical platform used to implement the model; concrete implementations can be derived from the platform independent model by platform specific models or mappings

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platform specific model (PSM)
definition

model of aspects of an information system (e.g. the data model) that is linked to a specific technological platform (e.g. a specific programming language or data transfer syntax)

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intersection location (ILOC)
definition

the basis of a dynamic referencing system named “ILOC referencing system”, subsequently adopted by TPEG as “TPEG-Loc”

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primary point
definition

point met at the end of a linear road section when it is travelled according to the location direction

NOTE In case of an affected area with an event it generally pinpoints the origin of the event.

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variable message sign (VMS, PDZ)
definition

a 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

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predefined location
definition

location using a unique identifier (reference) that is agreed upon in both sender and receiver system to select a location from a set of locations already exchanged

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variable message sign unit (VMS unit)
definition

a roadside unit which may control one or more variable message signs on a single gantry/mounting or on closely associated separate gantries/mountings

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secondary point
definition

point met first when a linear road section is travelled according to the location direction

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latitude; geodetic latitude
definition

geodetic latitude angle from the equatorial plane to the perpendicular to the Earth through a given point, northwards treated as positive

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term
elaborated data
definition

data which is derived/computed from one or more measurements over a period of time

NOTE 1 to entry: It may be a current value or a forecast value predicted from historical measurements.

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