How can driver fatigue be recognized?

Driver fatigue can be recognized primarily through signs such as difficulty focusing and frequent yawning. These symptoms indicate that a driver is experiencing a decline in alertness and is unable to maintain proper attention on the road. Difficulty focusing can lead to slower reaction times and impaired decision-making, which significantly increases the risk of accidents. Frequent yawning is a common physical sign of tiredness, suggesting that the body is signaling a need for rest. Recognizing these warning signs is crucial in ensuring safety while driving, as they serve as indicators that one should take a break and avoid driving until alertness is restored.

In contrast, feelings of increased alertness, being energetic, or having higher-than-normal concentration levels are not signs of fatigue, but rather indicate that the driver is in a good state to operate a vehicle safely. These factors do not relate to the recognition of driver fatigue, as they suggest the opposite condition.