The reaction distance is defined as:
Human factor: Reaction, braking, and stopping
Explanation
The **reaction distance** is the space you cover with the vehicle from the moment you detect a hazard, such as an obstacle or a signal, until you act on the vehicle's controls, for example, by pressing the brake. This reaction time is usually about 0.75 seconds, although it can vary depending on the driver's reflexes and physical and psychological state.
It is important to understand that the **reaction distance** is only a part of the **stopping distance**, which also includes the **braking distance**. The braking distance is the space you cover from the moment you start braking until the vehicle comes to a complete stop. Therefore, the stopping distance is the sum of the reaction distance and the braking distance.
The **safety distance**, on the other hand, is the distance you must maintain between your vehicle and the one in front to be able to react in time to any unforeseen event.
In summary, the **reaction distance** specifically refers to the space covered from the moment you see a hazard until you act on the vehicle's controls, which makes the first response the correct one.
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