FÖRELÄSNING V.4 TRUE/FALSE

Question 1

Crashes happen when drivers exceed their comfort zone.

Answer 1

Not necessarily true

Question 2

Crash scenarios need to be determined and a causation mechanisms understood before active
safety systems may be developed.

Answer 2

TRUE

Question 2

Drivers do not optimally control their vehicles.

Answer 2

TRUE

Question 3

A crash may happen as a consequence of an adaptation failure such as the driver underestimating the deceleration of the vehicle in front.

Answer 3

TRUE

Question 3

If drivers do not trust a system, they will not accept it and will turn it off when possible

Answer 3

Very likely
to be true

Question 4

A typical crash scenario for lane departure warning would be a run-off-road crash

Answer 4

TRUE

Question 4

A typical use case for a distance alert system would be based on a car-following situation.

Answer 4

TRUE

Question 4

Over time, active safety systems improve by increasing the number and variety of crash scenarios
and use cases that they can address

Answer 4

TRUE

Question 5

ETTC is lower than TG if the vehicle in front is braking

Answer 5

TRUE (most likely)

Question 6

TTC = TG for stationary objects.

Answer 6

TRUE

Question 7

Required deceleration may be very different even when TTC is the same

Answer 7

TRUE

Question 8

PET is the distance between two vehicles as they approach an intersection

Answer 8

FALSE

Question 9

Time to lane crossing is the “time to collision” from the tire to the lane markings

Answer 9

TRUE

Question 10

Threat number may be defined for braking and steering and indicates how close is the current threat to the limits of the possible intervention.

Answer 10

TRUE

Question 11

Single-behaviour-threat-metrics are robust and computationally expensive.

Answer 11

FALSE

Question 12

Data-driven methodologies for threat assessment and decision making require large
datasets, often coded by humans.

Answer 12

TRUE

Question 13

Threat assessment algorithms may estimate in real-time the necessary required jerk and required steering rate to avoid a collision.

Answer 13

TRUE

Question 14

Decision making algorithms base their decision on what the driver and
the vehicle are able to do (driver models).

Answer 14

TRUE

Question 15

For rear-end scenarios, if speed is above 60 km/h and TTC below 0.5s, AEB may be the only way to help, but we will still crash

Answer 15

TRUE

Question 16

A visual warning is more effective than a warning based on the combination of visual and auditory modalities

Answer 16

Likely to be
false

Question 17

False warnings should be minimized because they reduce system acceptance.

Answer 17

TRUE