Failure of one of the mentioned systems and the unawareness of it by the driver maneuvering the car may lead to misunderstanding of the road situation by other drivers, which will cause a deterioration in active safety in general. The correctness and timeliness of the assessment of the road situation by drivers largely depend on such factors, how: visibility, the efficiency of the headlamps, clean windows and their heating.

Confidence, and the driver's reliability during long-term driving depends on the comfort of work in the cabin, determined by the microclimate, soundproofing, comfortable seats and access to controls (ergonomics), no harmful vibrations. In addition, the typification of the location and operation of control units in various vehicles has a significant impact on the reliability of the driver's work (the stability of the location and equal forces necessary to move the controls, the same methods of starting and unlocking them).

Car - driver interaction with. road surface is determined by the road conditions and situation, that is, ultimately - steerability. Steering stability is a conscious trade-off between speed and safety, In a broader sense of the word, stability is the ability of a system to maintain the required or set specificities in the event of environmental disturbances.

The driver's ability to carry out the work, as well as the vehicle's stability and steerability, together determine the reliability of the S — K — D system. The mentioned concepts correlate well with each other and explain the causal relationships of road accidents.