In what way do the 2-4-12 second visual leads apply?

Question:-In what way do the 2-4-12 second visual leads apply?

Answer:

The first visual takes up to 2-4-12 seconds and represents a defensive driving method that commercial drivers usually use. This process includes steering ahead 12 seconds to detect any hazards, 4 seconds for traffic tracking, and 2 seconds to review the road in front of it. Thus, the care allows them to be ready for unexpected alternations in weather and be able to respond in time