Driver Status Identification from Driving Behavior Signals - Digital Signal Processing for In-Vehicle Systems and Safety - page 33

Fig. 3.2 Laser scan reading and the photo for a selected driver
A driver determines the action to take by considering the road environment and
operates the gas or brake pedal. The velocity of the vehicle changes according to the
driver's operation and the distance from the vehicle in front (road environment),
and it also changes according to the vehicle's status.