FSRA off state

direct access for activation of FSRA active state is disabled

direct access for activation of FSRA active state is disabled

FSRA speed control state

state in which the system controls the speed according to the set speed

state in which the system controls the speed according to the set speed

FSRA stand-by state

state in which there is no longitudinal control by FSRA system and the system is ready for activation by the driver

state in which there is no longitudinal control by FSRA system and the system is ready for activation by the driver

full driving automation; level 5 Automated Driving System (Level 5 ADS)

ADS that is capable of unconditional (i.e. not ODD-specific) operation and providing its own fallback, without any expectation that a human driver will respond to a request to intervene
NOTE 1 to entry: Other driving automation levels include “level 1 driving automation”, “level 2 driving automation”, “level 3 ADS” and “level 4 ADS”.

ADS that is capable of unconditional (i.e. not ODD-specific) operation and providing its own fallback, without any expectation that a human driver will respond to a request to intervene
NOTE 1 to entry: Other driving automation levels include “level 1 driving automation”, “level 2 driving automation”, “level 3 ADS” and “level 4 ADS”.

full speed range adaptive cruise control (FSRA)

class of adaptive cruise control systems, which allows the subject vehicle to follow a forward vehicle at an appropriate distance by controlling the engine and/or power train and the brake down to standstill

class of adaptive cruise control systems, which allows the subject vehicle to follow a forward vehicle at an appropriate distance by controlling the engine and/or power train and the brake down to standstill

go operation

driver action to convey to the system the intention of placing the subject vehicle in motion
EXAMPLE: Operation of the accelerator pedal and operation of a switch for starting the subject vehicle.

driver action to convey to the system the intention of placing the subject vehicle in motion
EXAMPLE: Operation of the accelerator pedal and operation of a switch for starting the subject vehicle.

G

gravitational acceleration (m/s²)

heavy vehicle category

single vehicle or combination of vehicles defined as Category 1-2 or Category 2 in the United Nations Economic and Social Council World Forum for Harmonization of Vehicle Regulations (WP.29) TRANS/WP.29/1045
NOTE 1 to entry: A truck is in the heavy vehicle category.

single vehicle or combination of vehicles defined as Category 1-2 or Category 2 in the United Nations Economic and Social Council World Forum for Harmonization of Vehicle Regulations (WP.29) TRANS/WP.29/1045
NOTE 1 to entry: A truck is in the heavy vehicle category.

high driving automation; level 4 Automated Driving System (Level 4 ADS)

ADS that is capable of operating within a specific ODD and providing its own fallback, without any expectation that a human driver will respond to a request to intervene
NOTE 1 to entry: Other driving automation levels include “level 1 driving automation”, “level 2 driving automation”, “level 3 ADS”, and “level 5 ADS”.

ADS that is capable of operating within a specific ODD and providing its own fallback, without any expectation that a human driver will respond to a request to intervene
NOTE 1 to entry: Other driving automation levels include “level 1 driving automation”, “level 2 driving automation”, “level 3 ADS”, and “level 5 ADS”.

At

illuminated surface

in-vehicle driver

driver that performs the dynamic driving task using the vehicle's built-in input devices to control the longitudinal and lateral movement of the vehicle

driver that performs the dynamic driving task using the vehicle's built-in input devices to control the longitudinal and lateral movement of the vehicle

incidental visible road feature

visible patterns on the road surface that were not explicitly intended to delineate the boundaries of the lane, but which are indicative of the position of the lane
NOTE 1 to entry: These can include such features as pavement seams or edges and curbs.

visible patterns on the road surface that were not explicitly intended to delineate the boundaries of the lane, but which are indicative of the position of the lane
NOTE 1 to entry: These can include such features as pavement seams or edges and curbs.

jerk

third derivative with respect to time of the position of an object; equivalently the rate of change of the acceleration of an object; considered a measure of harshness of vehicle motion

third derivative with respect to time of the position of an object; equivalently the rate of change of the acceleration of an object; considered a measure of harshness of vehicle motion

judgement distance

distance travelled by a vehicle until the driver judges what action is to be taken after having received information about a traffic impediment

distance travelled by a vehicle until the driver judges what action is to be taken after having received information about a traffic impediment

lane boundary

borderline of the lane that is determined by a visible lane marking; and in the absence of a visible lane marking, by incidental visible road features or other means such as GPS, magnetic nails, etc
NOTE 1 to entry: In the case of a visible lane marking, the boundary is at the center thereof.

borderline of the lane that is determined by a visible lane marking; and in the absence of a visible lane marking, by incidental visible road features or other means such as GPS, magnetic nails, etc
NOTE 1 to entry: In the case of a visible lane marking, the boundary is at the center thereof.

lane departure

point of departure across the lane boundary

point of departure across the lane boundary

lane departure warning

warning given to the driver in accordance with the lane departure warning condition in the absence of suppression requests

warning given to the driver in accordance with the lane departure warning condition in the absence of suppression requests

LCDAS

lane change decision aid systems

lane change warning function

the lane change warning function is defined as a function that includes the blind spot warning function and the closing vehicle warning function

the lane change warning function is defined as a function that includes the blind spot warning function and the closing vehicle warning function

lane keeping actions

actions which the system performs to influence the lateral movement of the subject vehicle with the intention of helping the driver to keep the vehicle within the lane

actions which the system performs to influence the lateral movement of the subject vehicle with the intention of helping the driver to keep the vehicle within the lane

lane; traffic lane

portion of carriageway designed to accommodate a single line of moving road vehicles
NOTE 1 to entry: The term “lane” is often used to refer to a “traffic lane” when the context is known to be “traffic”.
NOTE 2 to entry: A traffic lane can be bi-directional, such as a single lane road, a two-way turn/overtaking lane, or a reversible flow lane.
NOTE 3 to entry: Some jurisdictions allow…

portion of carriageway designed to accommodate a single line of moving road vehicles
NOTE 1 to entry: The term “lane” is often used to refer to a “traffic lane” when the context is known to be “traffic”.
NOTE 2 to entry: A traffic lane can be bi-directional, such as a single lane road, a two-way turn/overtaking lane, or a reversible flow lane.
NOTE 3 to entry: Some jurisdictions allow supplemental uses of a traffic lane, such as multiple motorcycles sharing the width of a traffic lane or allowing a bicycle to use the edge of a lane.

lateral clearance

the lateral clearance of a target vehicle is defined as the lateral distance between the side of the subject vehicle and the near side of a target vehicle.

the lateral clearance of a target vehicle is defined as the lateral distance between the side of the subject vehicle and the near side of a target vehicle.

lateral offset

lateral distance between the longitudinal centerlines of a subject vehicle (SV) and a target vehicle (TV), measured as a percentage of the width of the SV, such that if the centers of the two vehicles are aligned, the value is zero

lateral distance between the longitudinal centerlines of a subject vehicle (SV) and a target vehicle (TV), measured as a percentage of the width of the SV, such that if the centers of the two vehicles are aligned, the value is zero

latest warning line

outermost limit of the warning threshold

outermost limit of the warning threshold

LCDAS target vehicle

any vehicle that is closing on the subject vehicle from behind, or any vehicle that is located in one of the adjacent zones

any vehicle that is closing on the subject vehicle from behind, or any vehicle that is located in one of the adjacent zones

level 1 driving automation; driver assistance

driver support system that provides either sustained lateral or sustained longitudinal vehicle motion control within a specific operational design domain with the expectation that a conventional driver completes the DDT
NOTE 1 to entry: Other driving automation levels include “level 2 driving automation”, “level 3 ADS”, “level 4 ADS”, and “level 5 ADS”.

driver support system that provides either sustained lateral or sustained longitudinal vehicle motion control within a specific operational design domain with the expectation that a conventional driver completes the DDT
NOTE 1 to entry: Other driving automation levels include “level 2 driving automation”, “level 3 ADS”, “level 4 ADS”, and “level 5 ADS”.

level 2 driving automation; partial driving automation

driver support system that provides sustained lateral and longitudinal vehicle motion control within a specific operational design domain with the expectation that a conventional driver completes the object and event detection and response
NOTE 1 to entry: Other driving automation levels include “level 1 driving automation”, “level 3 ADS”, “level 4 ADS”, and “level 5 ADS”.

driver support system that provides sustained lateral and longitudinal vehicle motion control within a specific operational design domain with the expectation that a conventional driver completes the object and event detection and response
NOTE 1 to entry: Other driving automation levels include “level 1 driving automation”, “level 3 ADS”, “level 4 ADS”, and “level 5 ADS”.

limited speed range adaptive cruise control; LSRA cruise control (LSRA)

class of adaptive cruise control systems, which allows the subject vehicle to follow a forward vehicle at an appropriate distance by controlling the engine and/or power train and the brake above a certain minimum velocity

class of adaptive cruise control systems, which allows the subject vehicle to follow a forward vehicle at an appropriate distance by controlling the engine and/or power train and the brake above a certain minimum velocity

LKAS active state

system is switched on and the activation criteria are met

system is switched on and the activation criteria are met

LKAS off state

system is switched off

system is switched off