PKIX

public key infrastructure based on X.509 certificates

public safety on-board equipment (PSOBE)

OBE or ASD mounted or in an authorized public safety vehicle
NOTE 1 to entry: It may be designed to transmit at a higher power to allow its messages to be received from a greater distance to provide more time to complete appropriate clearance intervals at signalized intersections.

OBE or ASD mounted or in an authorized public safety vehicle
NOTE 1 to entry: It may be designed to transmit at a higher power to allow its messages to be received from a greater distance to provide more time to complete appropriate clearance intervals at signalized intersections.

TSP

public transport signal priority

public transport vehicle on-board equipment (PTVOBE)

OBE or ASD mounted or within a public transport vehicle

OBE or ASD mounted or within a public transport vehicle

queue jump

queue jump operation where public transport vehicles are provided an advantage over adjacent vehicles through signal operations that allow the public transport vehicle to enter an intersection in advance of the adjacent vehicles

queue jump operation where public transport vehicles are provided an advantage over adjacent vehicles through signal operations that allow the public transport vehicle to enter an intersection in advance of the adjacent vehicles

RF

Radio Frequency

RTCM

Radio Technical Commission for Maritime Services

raw data

data of a sensor control network (SCN) in the untreated format as specified by the SCN owner

data of a sensor control network (SCN) in the untreated format as specified by the SCN owner

raw data source identifier

unique identifier of an entity in an SCN

unique identifier of an entity in an SCN

registered ITS-S flow

ITS-S flow that has been allocated an ITS-S-FlowID

ITS-S flow that has been allocated an ITS-S-FlowID

registry

repository for maintaining data requester’s information including the type of data they are subscribing to, their address, etc.

repository for maintaining data requester’s information including the type of data they are subscribing to, their address, etc.

relevance zone

parts of the road network for which the contextual speed is valid

parts of the road network for which the contextual speed is valid

RITA

Research and Innovative Technology Administration

resources

functional entity constituting endpoints of ITS-S application process activity

functional entity constituting endpoints of ITS-S application process activity

retrofit

addition of new technology or features to existing systems

addition of new technology or features to existing systems

RHW

Road Hazard Warning

road sign

physical traffic control device intended to communicate specific information to road users through a word, symbol, and/or arrow legend
NOTE 1 to entry: Road signs do not include highway traffic signals, pavement markings, delineators, or channelization devices.

physical traffic control device intended to communicate specific information to road users through a word, symbol, and/or arrow legend
NOTE 1 to entry: Road signs do not include highway traffic signals, pavement markings, delineators, or channelization devices.

road surface condition

environmental measures of a pavement's running surface including temperature and moisture condition
EXAMPLE: Dry, wet, snowy, icy, chemical concentration, oil, etc.
NOTE 1 to entry: This information may also include information regarding surface conditions that could be used to compute stopping distances for selected use cases.

environmental measures of a pavement's running surface including temperature and moisture condition
EXAMPLE: Dry, wet, snowy, icy, chemical concentration, oil, etc.
NOTE 1 to entry: This information may also include information regarding surface conditions that could be used to compute stopping distances for selected use cases.

roadway segment

section of a highway improved, designed, or ordinarily used for vehicular travel and parking lanes, or that portion of a highway improved, designed, or ordinarily used for vehicular travel and parking lanes, but exclusive of the sidewalk, berm, or shoulder even though such sidewalk, berm, or shoulder is used by persons riding bicycles or other human-powered vehicles

section of a highway improved, designed, or ordinarily used for vehicular travel and parking lanes, or that portion of a highway improved, designed, or ordinarily used for vehicular travel and parking lanes, but exclusive of the sidewalk, berm, or shoulder even though such sidewalk, berm, or shoulder is used by persons riding bicycles or other human-powered vehicles

rid

routine identifier

SatNav

satellite navigation

2G

second-generation cellular phone technology e.g. GSM

SDEE

secure data exchange entity

secure data interface (SDI)

gateway providing bidirectional means for security and access control

gateway providing bidirectional means for security and access control

SNI

secure network interface

SPAKE2

secure password authenticated key exchange 2

secure session

functional entity providing confidentiality, integrity, authentication, guaranteed in-order delivery, and replay protection on the datagrams that are passed over it

functional entity providing confidentiality, integrity, authentication, guaranteed in-order delivery, and replay protection on the datagrams that are passed over it

SSTD

secure session between trusted devices

secure session service

functional entity responsible for establishing secure communications sessions with its peer instances

functional entity responsible for establishing secure communications sessions with its peer instances

SPDU

secured protocol data unit