a_{lateral_max}

maximum allowed lateral acceleration in curves

a_max

maximum allowed longitudinal acceleration

a_{d_max}

maximum braking deceleration (m/s²)

maximum operating speed (V_min)

maximum subject vehicle speed at which the CSWS shall operate

maximum subject vehicle speed at which the CSWS shall operate

a_{vehicle_max}

maximum possible deceleration capability during manual driving

minimum allowed curve speed warning time (t_csw)

lower threshold of the curve speed warning time
NOTE 1 to entry: The value of minimum allowed curve speed warning time is decided considering the amount of overspeed of the subject vehicle and the reaction delay of drivers.

lower threshold of the curve speed warning time
NOTE 1 to entry: The value of minimum allowed curve speed warning time is decided considering the amount of overspeed of the subject vehicle and the reaction delay of drivers.

a_min

minimum allowed longitudinal acceleration = Maximum allowed longitudinal deceleration

θ_min

minimum AOC (deg)

minimum countermeasure action point (MCAP)

value of PUP, relative to an expected collision, for which initiation of a specific countermeasure shall be required

value of PUP, relative to an expected collision, for which initiation of a specific countermeasure shall be required

minimum FVCMS deceleration

minimum FVCMS deceleration that the system must achieve while mitigation braking (MB) is active, measured on smooth, dry, clean pavement

minimum FVCMS deceleration that the system must achieve while mitigation braking (MB) is active, measured on smooth, dry, clean pavement

S_{warn_min}

minimum of warning threshold distance considering Vcurrent and tCSW_min (m)

minimum operating speed (t_{csw_min})

minimum subject vehicle speed at which the CSWS shall operate

minimum subject vehicle speed at which the CSWS shall operate

minimum required deceleration (m/s²) (a_{d_req})

deceleration that, if constant, would enable the subject vehicle to match the warning threshold speed for the target curvature point of interest

deceleration that, if constant, would enable the subject vehicle to match the warning threshold speed for the target curvature point of interest

minimum velocity (V_min)

the minimum subject vehicle (SV) speed for which FVCMS must be capable of activating a countermeasure

the minimum subject vehicle (SV) speed for which FVCMS must be capable of activating a countermeasure

mitigation braking (MB)

FVCMS countermeasure that responds to the detection of a very likely rear-end collision by automatically activating braking to quickly reduce the relative velocity, within the minimum requirements

FVCMS countermeasure that responds to the detection of a very likely rear-end collision by automatically activating braking to quickly reduce the relative velocity, within the minimum requirements

monitoring range (m. r.)

specific three-dimensional space around the vehicle, which is divided into rear and front corner m.r., front, rear-1 and rear-2 m.r
NOTE: The covered monitoring ranges depend on the intended use of the system.

specific three-dimensional space around the vehicle, which is divided into rear and front corner m.r., front, rear-1 and rear-2 m.r
NOTE: The covered monitoring ranges depend on the intended use of the system.

multiple curve

curved road which is a combination of two or more closely located curved roads where the curved roads are constant radius curvatures
NOTE 1 to entry: The clothoid can be included.

curved road which is a combination of two or more closely located curved roads where the curved roads are constant radius curvatures
NOTE 1 to entry: The clothoid can be included.

no warning zone

zone between the two earliest warning lines

zone between the two earliest warning lines

nomadic vehicle input device; nomadic input device

input device that can be carried into, or in near proximity of, a vehicle and connected as desired
EXAMPLE: A smartphone connected to a vehicle (via USB or Bluetooth) to provide driver navigation on the vehicle's large screen display
NOTE 1 to entry: NDs are often more closely associated with a person than they are with the vehicle.
NOTE 2 to entry: Nomadic input devices do not…

input device that can be carried into, or in near proximity of, a vehicle and connected as desired
EXAMPLE: A smartphone connected to a vehicle (via USB or Bluetooth) to provide driver navigation on the vehicle's large screen display
NOTE 1 to entry: NDs are often more closely associated with a person than they are with the vehicle.
NOTE 2 to entry: Nomadic input devices do not require a maintenance operation to connect or disconnect.

obstacle vehicles

vehicles, both moving and stationary, considered potential hazards that can be detected by this system
EXAMPLE: Motor vehicles only, that is cars, trucks, buses, and motorcycles.

vehicles, both moving and stationary, considered potential hazards that can be detected by this system
EXAMPLE: Motor vehicles only, that is cars, trucks, buses, and motorcycles.

d_max

on the section of a curved road, the maximum distance from the point on the line consisting of two neighbouring road shape points to the point on the arc of the section (m)

operational design domain (ODD)

set of operating conditions under which a given driving automation system or feature thereof is specifically designed to function
EXAMPLE: 1 ADS feature designed to operate a vehicle only on fully access-controlled freeways in low-speed traffic, under fair weather conditions and optimal road maintenance conditions (e.g. good lane markings and not under construction).
EXAMPLE: 2 ADS…

set of operating conditions under which a given driving automation system or feature thereof is specifically designed to function
EXAMPLE: 1 ADS feature designed to operate a vehicle only on fully access-controlled freeways in low-speed traffic, under fair weather conditions and optimal road maintenance conditions (e.g. good lane markings and not under construction).
EXAMPLE: 2 ADS-dedicated vehicle designed to operate only within a geographically-defined area, and only during daylight at speeds not exceeding 25 mph.
NOTE 1 to entry: The conditions can include environmental, geographical, time-of-day, and/or other restrictions.
NOTE 2 to entry: The conditions can require the presence or absence of certain traffic or roadway characteristics.

out-of-sight range

distance from the point where a variable message sign becomes no longer readable to the place where the variable message sign is located

distance from the point where a variable message sign becomes no longer readable to the place where the variable message sign is located

overtaking speed

the subject vehicle’s overtaking speed is defined as the difference between the subject vehicle’s speed and the target vehicle’s speed when the subject vehicle is overtaking the target vehicle
NOTE: A positive overtaking speed indicates that the subject vehicle is moving faster than the target vehicle.

the subject vehicle’s overtaking speed is defined as the difference between the subject vehicle’s speed and the target vehicle’s speed when the subject vehicle is overtaking the target vehicle
NOTE: A positive overtaking speed indicates that the subject vehicle is moving faster than the target vehicle.

parking slot defining lines

painted lines on the ground surface in a bright colour to identify the boundary of a defined parking slot

painted lines on the ground surface in a bright colour to identify the boundary of a defined parking slot

potential vehicle of interest (PVOI)

connected vehicle that exists in the V2V CACC region of interest, communicates with the subject vehicle, is of possible interest to the longitudinal control, and is not the target vehicle (TV)

connected vehicle that exists in the V2V CACC region of interest, communicates with the subject vehicle, is of possible interest to the longitudinal control, and is not the target vehicle (TV)

pre-collision urgency parameter (PUP)

real-time parameter that signifies the urgency of a potential future collision

real-time parameter that signifies the urgency of a potential future collision

preliminary collision warning

information that the system gives to the driver in the early stages of a potentially dangerous situation that may result in a rear end collision.
NOTE 1 to entry: The system may provide this warning prior to the collision warning.

information that the system gives to the driver in the early stages of a potentially dangerous situation that may result in a rear end collision.
NOTE 1 to entry: The system may provide this warning prior to the collision warning.

radar cross section (RCS)

measure of the reflective strength of a radar target measured in square meters, and defined as 4π times the ratio of the power per unit solid angle scattered in a specified direction to the power per unit area in a radio wave incident on the scatterer from a specified direction

measure of the reflective strength of a radar target measured in square meters, and defined as 4π times the ratio of the power per unit solid angle scattered in a specified direction to the power per unit area in a radio wave incident on the scatterer from a specified direction

R

radius of curvature at a point along a curved roadway (m)