brake

part in which the forces opposing the movement of the vehicle develop
NOTE 1 to entry: It can be a friction brake (when the forces are generated by friction between two parts of the vehicle moving relatively to one another); an electrical brake (when the forces are generated by electro-magnetic action between two parts of the vehicle moving relatively but not in contact with one another); a…

part in which the forces opposing the movement of the vehicle develop
NOTE 1 to entry: It can be a friction brake (when the forces are generated by friction between two parts of the vehicle moving relatively to one another); an electrical brake (when the forces are generated by electro-magnetic action between two parts of the vehicle moving relatively but not in contact with one another); a fluid brake (when the forces are generated by the action of a fluid situated between two parts of the vehicle moving relatively to one another); an engine brake (when the forces are derived from an artificial increase in the braking action, transmitted to the wheels, of the engine).
NOTE 2 to entry: Definition according to ECE-R 13-H, transmission control devices are not considered as brakes.

built-in vehicle input device; built-in input device

input device designed to be physically connected to a vehicle and to remain connected even when the vehicle is not in use
NOTE 1 to entry: Built-in input devices include devices that can be temporarily disconnected for security reasons (e.g. some radios are equipped with detachable front panels).
NOTE 2 to entry: Built-in input devices are typically considered to be a part of the…

input device designed to be physically connected to a vehicle and to remain connected even when the vehicle is not in use
NOTE 1 to entry: Built-in input devices include devices that can be temporarily disconnected for security reasons (e.g. some radios are equipped with detachable front panels).
NOTE 2 to entry: Built-in input devices are typically considered to be a part of the vehicle.
NOTE 3 to entry: Built-in input devices require a maintenance operation to connect or disconnect.

camera blind spot range

distance from the location where a camera is installed to the beginning of the area over which the camera is able to monitor traffic impediments
NOTE: The camera is unable to monitor traffic impediments in this blind area.

distance from the location where a camera is installed to the beginning of the area over which the camera is able to monitor traffic impediments
NOTE: The camera is unable to monitor traffic impediments in this blind area.

clearance; inter vehicle distance (c)

distance from the forward vehicle's trailing surface to the subject vehicle's leading surface

distance from the forward vehicle's trailing surface to the subject vehicle's leading surface

closing speed (CS)

relative velocity between the subject vehicle and the detected obstacle, regardless of whether one or both is/are stationary or moving

relative velocity between the subject vehicle and the detected obstacle, regardless of whether one or both is/are stationary or moving

closing vehicle warning function

the closing vehicle warning function is defined as a function that detects closing vehicles in one or more of the rear zones and warns the driver per the requirements given in ISO 17387

the closing vehicle warning function is defined as a function that detects closing vehicles in one or more of the rear zones and warns the driver per the requirements given in ISO 17387

collision warning

information that the system gives to the driver indicating the need for urgent action to avoid or reduce the severity of a potential rear end collision with another forward vehicle
NOTE 1 to entry: This warning is issued in the advanced stages of a dangerous situation to warn the driver of the need to perform emergency braking, lane changing or other emergency manoeuvres in order to avoid a…

information that the system gives to the driver indicating the need for urgent action to avoid or reduce the severity of a potential rear end collision with another forward vehicle
NOTE 1 to entry: This warning is issued in the advanced stages of a dangerous situation to warn the driver of the need to perform emergency braking, lane changing or other emergency manoeuvres in order to avoid a collision.

conditional driving automation; level 3 Automated Driving System (Level 3 ADS)

ADS designed with the expectation that the fallback-ready user is available to intervene
NOTE 1 to entry: Level 3 ADSs are restricted to operating within a specific ODD.
NOTE 2 to entry: Other driving automation levels include “level 1 driving automation”, “level 2 driving automation”, “level 4 ADS”, and “level 5 ADS”.
NOTE 3 to entry: The user can intervene due to an ADS-issued…

ADS designed with the expectation that the fallback-ready user is available to intervene
NOTE 1 to entry: Level 3 ADSs are restricted to operating within a specific ODD.
NOTE 2 to entry: Other driving automation levels include “level 1 driving automation”, “level 2 driving automation”, “level 4 ADS”, and “level 5 ADS”.
NOTE 3 to entry: The user can intervene due to an ADS-issued request, a DDT performance-relevant system failure, or other reasons.

conditions of transport

congested traffic

traffic condition where the driver, at lower speed, repeatedly starts, follows a forward vehicle, and stops in order to keep a proper following distance behind the forward vehicle

traffic condition where the driver, at lower speed, repeatedly starts, follows a forward vehicle, and stops in order to keep a proper following distance behind the forward vehicle

conventional cruise control (CCC)

system capable of controlling the speed of a vehicle as set by the driver

system capable of controlling the speed of a vehicle as set by the driver

conventional vehicle; automation-equipped conventional vehicle

vehicle designed to be operated by a person during part or all of every trip.

vehicle designed to be operated by a person during part or all of every trip.

countermeasure action point (CAP)

value of pre-collision urgency parameter (PUP), relative to an expected collision, for which FVCMS initiates a countermeasure

value of pre-collision urgency parameter (PUP), relative to an expected collision, for which FVCMS initiates a countermeasure

coverage zone

the coverage zone is defined as the entire area to be monitored by a LCDAS; in other words, a target vehicle located within the coverage zone will be detected by the system
NOTE 1 to entry: A system’s coverage zone will consist of a specific subset of the following zones: left adjacent zone, right adjacent zone, left rear zone, and right rear zone.

the coverage zone is defined as the entire area to be monitored by a LCDAS; in other words, a target vehicle located within the coverage zone will be detected by the system
NOTE 1 to entry: A system’s coverage zone will consist of a specific subset of the following zones: left adjacent zone, right adjacent zone, left rear zone, and right rear zone.

CSWS available state

system is in on state and the system has sufficient information to make decisions on whether the warning criteria are fulfilled or not

system is in on state and the system has sufficient information to make decisions on whether the warning criteria are fulfilled or not

CSWS non-warning state

system is in available state and the warning criteria are not all met
NOTE 1 to entry: The system periodically judges whether the criteria are met in order to transition to the warning state.

system is in available state and the warning criteria are not all met
NOTE 1 to entry: The system periodically judges whether the criteria are met in order to transition to the warning state.

CSWS unavailable state

system is in on state and the system has inadequate information
NOTE 1 to entry: The system cannot make a decision whether the warning criteria are met or not because of fault in GNSS device, lack of map data, or other reasons.

system is in on state and the system has inadequate information
NOTE 1 to entry: The system cannot make a decision whether the warning criteria are met or not because of fault in GNSS device, lack of map data, or other reasons.

CSWS warning state

system is in available state and the warning criteria are all met
NOTE 1 to entry: The CSWS starts warning(s) or is operating the warning(s). The system periodically judges whether the criteria are met in order to transition to the non-warning state.

system is in available state and the warning criteria are all met
NOTE 1 to entry: The CSWS starts warning(s) or is operating the warning(s). The system periodically judges whether the criteria are met in order to transition to the non-warning state.

V_current

current speed of the subject vehicle (m/s))

curvature point

arbitrary points on the curved road that has associated location and value of curvature

arbitrary points on the curved road that has associated location and value of curvature

curvature point of interest

point of the curved road ahead where the distances from the subject vehicle to the curved roads are less than the look ahead distance, SLAD

point of the curved road ahead where the distances from the subject vehicle to the curved roads are less than the look ahead distance, SLAD

curve cutting

act of driving to the inner side of a curve, which can lead to an intentional lane departure

act of driving to the inner side of a curve, which can lead to an intentional lane departure

curve end point

location where the radius of curvature of the curved roadway ahead becomes ≥RC

location where the radius of curvature of the curved roadway ahead becomes ≥RC

curve speed warning time (a_{d_req})

time when the curve speed warning starts which is greater than or equal to the minimum allowed curve speed warning time tcsw ≥ tcsw_min
NOTE 1 to entry: The tCSW, Swarn, and Vcurrent has the following relationship: tcsw = Swarn /Vcurrent
NOTE 2 to entry: The value of tCSW is selected by the manufacturer.

time when the curve speed warning starts which is greater than or equal to the minimum allowed curve speed warning time tcsw ≥ tcsw_min
NOTE 1 to entry: The tCSW, Swarn, and Vcurrent has the following relationship: tcsw = Swarn /Vcurrent
NOTE 2 to entry: The value of tCSW is selected by the manufacturer.

curve start point

location where the radius of curvature of the curved roadway ahead becomes less than RC

location where the radius of curvature of the curved roadway ahead becomes less than RC

curved road

section where the radius of curvature is less than or equal to RC
NOTE 1 to entry: RC denotes the maximum radius of curvature to be regarded as a curvature point of interest for potential warning for CSWS.

section where the radius of curvature is less than or equal to RC
NOTE 1 to entry: RC denotes the maximum radius of curvature to be regarded as a curvature point of interest for potential warning for CSWS.

cut-in vehicle

forward adjacent vehicle that has a lateral component of motion towards the path of the subject vehicle

forward adjacent vehicle that has a lateral component of motion towards the path of the subject vehicle

cutting out

situation in which the target vehicle changes lanes from behind a preceding vehicle

situation in which the target vehicle changes lanes from behind a preceding vehicle

DDT performance-relevant system failure

malfunction in a vehicle system that prevents the driving automation system from reliably performing its portion of the DDT on a sustained basis
NOTE 1 to entry: The malfunction can be internal to the driving automation system or part of another vehicle system.

malfunction in a vehicle system that prevents the driving automation system from reliably performing its portion of the DDT on a sustained basis
NOTE 1 to entry: The malfunction can be internal to the driving automation system or part of another vehicle system.

default lane width

predetermined width given to a lane when a visible lane marking exists only on one side of the lane and no other lane boundaries are detected by the system

predetermined width given to a lane when a visible lane marking exists only on one side of the lane and no other lane boundaries are detected by the system