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Question 7721

Is a driver's reaction time always the same, or can it vary?

  1. It can vary depending on various factors, such as the driver's physical condition.
  2. Depending on various factors it can decrease, but never increase.
  3. No, it is always the same and will never be longer than one second.
Show answer and explanation

Correct answer: It can vary depending on various factors, such as the driver's physical condition.

It can vary. You react sooner when you're rested and alert, while drowsiness, fatigue, alcohol, drugs, or some medications increase your reaction time. There's no one-second limit, because with alcohol the normal 0.75 seconds can double. In the image, the driver's eyes are almost closed.

Cuestiones de Seguridad Vial. Edición 2026