Correct answer
from when the danger is perceived until the driver reacts, for example by pressing the brake.
Reaction distance is the distance travelled by the vehicle from when the danger is perceived until the driver reacts, for example by pressing the brake. In other words, it is the distance travelled by the vehicle from when the driver sees an obstacle until they decide how to pass it.
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from when the danger is perceived until the vehicle stops.
from when the danger is perceived until the driver reacts, for example by pressing the brake.
from when the driver reacts, for example by pressing the brake, until the vehicle stops.
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