Transient state: refers to a state in which the driver's attention to the main task of driving/controlling the vehicle is temporarily reduced, but can be restored immediately

Non-transient state: refers to a state in which the driver's ability to maintain concentration and perform driving tasks correctly is partially or completely reduced, and cannot be recovered during driving, and must be recovered after proper rest after driving.

1. General requirements

To pass the Driver Condition Monitoring assessment, the following conditions must be met:

(1) The DSM system should be on by default at the start of each trip and cannot be turned off by a short single press.

(2) The sensitivity of the DSM system shall not be manually adjusted.

(3) The driver status monitoring system should continuously monitor the driver status. Before the system starts measuring the driver's status, it must allow the vehicle to drive at a forward speed of at least 10km/h for a total of 1 minute.

(4) For distraction, microsleep, sleep, and driver unresponsiveness, the vehicle should warn and intervene when the vehicle speed is at least 20km/h, or at the lowest operating speed supported laterally. For the state of impaired driver ability, the vehicle must travel at least 50km/h, and in order to detect these impaired states, a learning period of 10 minutes is allowed at the beginning of each trip.

1.1 Noise variables

To score on the DSM system assessment, the system must cover the full range of driver types, occlusion conditions, and driving behaviors listed below.

(1) Driver

AF05-AM95: 5th percentile adult female height (153cm) to 95th percentile adult male height (188cm)

Any sitting position that allows the driver to perform the driving task correctly requires the relevant functions to function properly, that is, the driver can reach the pedals and steering wheel, and can see the road ahead.

Table 1 Fitzpatrick skin classification

1.2 Occlusion

Lighting measurement method: Refer to the CA protocol and measure on the outside of the vehicle.

The light transmittance of sunglasses should correspond to the light in the wavelength range used by the camera (the light transmittance of sunglasses should correspond to the light used by the sensor).

"Notify if it is not functioning properly" means that the driver will be notified by visual and/or audible cues within ten seconds of occlusion occurring when system performance degrades to the point where it is not functioning properly or is inactive. Auditory information about system failure is displayed only once per trip. Visual information should be displayed continuously or every 10 minutes as long as the system is not functioning properly.

1.3 Driving behavior

The vehicle manufacturer should explain whether and how the driving behavior affects the performance of Driver Condition Monitoring (DSM).

2. Transient driving state

In the case of use, driver distraction was assessed by observing behaviors such as owls (head turning), lizards (eye rolling), and body tilting.

Owl movement: A movement that diverts visual attention from the road and the position in front of the eye mainly by turning the head and then the eyes.

Lizard movement: A driving motion in which the driver focuses primarily on a task by moving his gaze rather than turning his head/face, while the head/face remains forward-facing driving motion.