The **vehicle's speed** directly influences the **driver's reaction distance**. The reaction distance is the space the vehicle travels from the moment the driver detects an unexpected event, such as a red traffic light, until they begin to react, for example, by pressing the brake.

- **The faster the vehicle goes**, the more distance it will cover during the reaction time. This is because, although the reaction time (usually between 0.5 and 1 second) does not change, the speed does. Therefore, at higher speeds, the vehicle will travel more meters in that same time.

- The **stopping distance** is the sum of the reaction distance and the braking distance. This means that speed affects not only the stopping distance but also the reaction distance.


In summary, as speed increases, the vehicle will cover more distance during the reaction time, which can lead to higher risk situations if not acted upon with sufficient anticipation.