What are some common signs of fatigue while driving?

Yawning, difficulty focusing, and drifting out of lanes are recognized signs of fatigue while driving. These symptoms indicate that a driver may be experiencing a decrease in alertness and cognitive function, which can significantly impair their ability to operate a vehicle safely. Yawning often signifies a lack of sleep or a decrease in energy levels, while difficulty focusing suggests that the driver's attention is waning, making it harder to react to changes in the driving environment. Drifting out of lanes is a physical manifestation of not having full control over the vehicle, often due to momentary lapses in concentration or sleepiness.

The other options do not effectively indicate fatigue. Frequent mirror checking is a sign of a vigilant driver, while rapid acceleration and hard braking may highlight aggressive or inattentive driving, but they do not directly relate to fatigue. Consistent speed maintenance generally suggests a driver is alert and following traffic laws appropriately, which contrasts with the signs of tiredness. Recognizing the signs of fatigue is essential for driver safety, emphasizing the importance of taking breaks and staying alert on the road.