The **reaction distance** is the space you cover with the vehicle from the moment you detect an obstacle until you make a decision to react, such as braking. This concept is key to understanding how a driver behaves when faced with an unexpected situation on the road.

- **Definition:** The reaction distance is the stretch that the vehicle covers while the driver processes the information of an obstacle and decides how to act. For example, from the moment you see a red traffic light until you decide to press the brake.

- **Influencing factors:** The reaction time, which is the time it takes for a person to respond to a stimulus, is usually approximately 0.75 seconds. However, this time can vary depending on the driver's reflexes, physical and psychological state, and environmental conditions. Factors such as fatigue, alcohol or drug consumption, and lack of attention can increase this reaction time.

- **Importance of speed:** The faster a vehicle goes, the more distance it will cover during the reaction time, which means it will reach the obstacle more quickly. Therefore, it is crucial to maintain an appropriate speed to have enough time and space to react safely.


In summary, the **reaction distance** is fundamental for road safety, as it determines the necessary space for a driver to adequately respond to unexpected situations on the road.