Driving in adverse weather conditions such as **fog, rain, or snow** requires a **higher level of attention** from the driver. These conditions reduce visibility and tire grip, making it more difficult to see the road, signs, and other vehicles. Therefore, the driver must be more alert and focused to maintain safety.


**Fatigue** manifests with symptoms such as difficulty concentrating, blurred vision, and slower reactions. These signs indicate that the driver is tired and should stop driving. When driving in difficult conditions, the additional effort to maintain attention can accelerate the onset of these fatigue symptoms.

Therefore, driving in fog, rain, or snow **favors the onset of fatigue** because the driver needs to be more attentive and focused, which can lead to tiredness more quickly.