The length of time you take to identify predict and decide to slow for a hazard is defined

   Perception time

Explanation:  The perception time is a psychological category, and it is a time that is necessary for an event to be observed, registered, and then passed through processing in the brain, that is, brain neurons, and to send the command for a responsible response based on that processing of information. This reaction also depends on the cognitive abilities of not only the pure signal processing in the brain, so it is a subjective category, because not everyone will need the same time to react. Since this is a subjective category, different times require events to be observed and reacted, i.e everyone has his or her own time of perception needed to identify a sudden new event and to unfold this event.

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