Many researchers have argued that two seconds is simply not enough time to prevent an accident. If the person ahead slams on his brakes, drivers need enough time to:
- Realize there is danger ahead
- Begin corrective action
- Take his foot off of the accelerator pedal and move it to the brake
- Apply the brake
- Wait for the brakes to engage
- Steer the vehicle to a safe stop
While it may seem like all of these actions can happen in the blink of an eye, the truth is that it can take up to a full five seconds for a driver to initiate the actions that avoid a crash—and that is under ideal circumstances. A driver who is distracted, tired, or driving during inclement weather or in a vehicle with worn brakes or tires should leave even more of a following distance.
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