additional lane

added lane which is branched from another lane

added lane which is branched from another lane

antenna

roadside equipment that communicates with the roadside units such as signal controllers and the in-vehicle units using radio signals

roadside equipment that communicates with the roadside units such as signal controllers and the in-vehicle units using radio signals

application layer (L7)

top layer of the OSI seven-layer model as defined in ISO/IEC 7498-4
NOTE: This layer defines the structure and format of the data packet content along with the rules and procedures for exchanging data packets.

top layer of the OSI seven-layer model as defined in ISO/IEC 7498-4
NOTE: This layer defines the structure and format of the data packet content along with the rules and procedures for exchanging data packets.

availability period (AP)

defined period of time in which the system is available

defined period of time in which the system is available

basic encoding rules (BER)

standardized determination of data encoding to conform to the requirements of ISO 8824, ASN.1
NOTE: The Basic Encoding Rules are given in ISO 8825.

standardized determination of data encoding to conform to the requirements of ISO 8824, ASN.1
NOTE: The Basic Encoding Rules are given in ISO 8825.

beacon

roadside equipment that communicates with the roadside units such as the signal controllers and the in-vehicle units

roadside equipment that communicates with the roadside units such as the signal controllers and the in-vehicle units

BCP

best current practice

calculation period (CP)

period over which the values are determined

period over which the values are determined

calculation/estimation method (CA)

the method used for calulation or estimation

the method used for calulation or estimation

centre; back office

computer or network that meets the requirements of a standardized communications interface over a fixed-point communications network, regardless of whether the centre is the only system within the building or just one of many, or even if the centre is in a remote location
NOTE 1 to entry: “Centres” include both government and private sector publishers and users of data.
entity that…

computer or network that meets the requirements of a standardized communications interface over a fixed-point communications network, regardless of whether the centre is the only system within the building or just one of many, or even if the centre is in a remote location
NOTE 1 to entry: “Centres” include both government and private sector publishers and users of data.
entity that provides application, management, administrative, and support functions from a fixed
location (the terms “back office” and “centre” are used interchangeably)
NOTE 1 to entry: Centre is, traditionally, a transportation-focused term, evoking management centres to support
transportation needs, while back office generally refers to commercial applications; from the perspective of this
Technical Report, these are considered the same.

CBC

cipher block chaining

clearance time

time between signal phases during which an intersection is not used by any traffic
NOTE 1 to entry: It is expressed in seconds.

time between signal phases during which an intersection is not used by any traffic
NOTE 1 to entry: It is expressed in seconds.

client

computer or application that requests and accepts data from a supplier computer or application using a protocol

computer or application that requests and accepts data from a supplier computer or application using a protocol

collection method (CM)

method used to obtain data, for example manual or computation

method used to obtain data, for example manual or computation

command

data packet which is prepared by one system in order to control some function(s) of another system
NOTE: Commands may be conveyed as a subscription (request) or publication (reply) depending on the design of the specific data exchange.

data packet which is prepared by one system in order to control some function(s) of another system
NOTE: Commands may be conveyed as a subscription (request) or publication (reply) depending on the design of the specific data exchange.

connected roadside equipment; ITS connected roadside equipment (RSE)

ITS roadside equipment that perform ITS services by exchanging electronic message with nearby vehicle systems and/or personal systems via short-range wireless technologies
NOTE 1 to entry: Connected roadside equipment typically provides ITS-related functionality but the term includes roadside equipment that only provide the ITS service of routing for short-range wireless technologies.
NOTE…

ITS roadside equipment that perform ITS services by exchanging electronic message with nearby vehicle systems and/or personal systems via short-range wireless technologies
NOTE 1 to entry: Connected roadside equipment typically provides ITS-related functionality but the term includes roadside equipment that only provide the ITS service of routing for short-range wireless technologies.
NOTE 2 to entry: The term “connected vehicle roadside equipment” is used within the current version of the Architecture Reference for Cooperative and Intelligent Transportation (ARC-IT).

connected unit; ITS connected unit

electronic device that is connected using one or more communication media

electronic device that is connected using one or more communication media

connected; ITS connected

characteristic of a material entity that is equipped with enabled (i.e. on) and operational electronic communication technologies to support ITS services, including the means to send and receive data to and from other connected entities
NOTE 1 to entry: The term “connected” does not imply support for any specific communications interface or ITS-S application process.

characteristic of a material entity that is equipped with enabled (i.e. on) and operational electronic communication technologies to support ITS services, including the means to send and receive data to and from other connected entities
NOTE 1 to entry: The term “connected” does not imply support for any specific communications interface or ITS-S application process.

connectionless transport profile

service that provides end-system to end-system communications without any connection set-up
EXAMPLE: UDP/IP.

service that provides end-system to end-system communications without any connection set-up
EXAMPLE: UDP/IP.

cross-verified (CV)

verification flag indicating whether the data value has been cross verified from one or more additional sources

verification flag indicating whether the data value has been cross verified from one or more additional sources

data correctness (DC)

the probability of the data value being correct (within the bounds of any stated accuracy)

the probability of the data value being correct (within the bounds of any stated accuracy)

data latency (DL)

delay encountered between the capture of the incoming/live data and the output of the related occurrence/information to a data consumer

delay encountered between the capture of the incoming/live data and the output of the related occurrence/information to a data consumer

data packet

entity of data that can be sent between end-application systems in order to exchange information
NOTE: A data packet relates to the Application Layer of the OSI stack and may be broken into several pieces by lower layer protocols.

entity of data that can be sent between end-application systems in order to exchange information
NOTE: A data packet relates to the Application Layer of the OSI stack and may be broken into several pieces by lower layer protocols.

data time stamping regime (TS)

meta-data which define what time stamping is applied to the data objects

meta-data which define what time stamping is applied to the data objects

data type(s) covered (DT)

a list of one or more types of data which a service will report

a list of one or more types of data which a service will report

data update interval (UI)

interval of data update

interval of data update

data update mode (UM)

the regime for providing updates to the high level data objects

the regime for providing updates to the high level data objects

data validity period (DV)

period after which the data objects can be considered to be no longer valid

period after which the data objects can be considered to be no longer valid

datagram

entity of data containing enough information to be routed from source to destination without relying on previous network configuration
EXAMPLE: IP datagram.

entity of data containing enough information to be routed from source to destination without relying on previous network configuration
EXAMPLE: IP datagram.

datagram publication

DATEX-ASN publication (reply) that is sent directly over the given transport profile, in contrast with a file publication

DATEX-ASN publication (reply) that is sent directly over the given transport profile, in contrast with a file publication