Ace the Texas DMV Written Test 2025 – Drive Your Way to Success!

Driver fatigue can significantly impair a person's ability to operate a vehicle safely. Yawning, heavy eyelids, and difficulty concentrating are clear indicators that a driver may be experiencing fatigue. Yawning is a common physiological response to tiredness, often signaling a need for sleep or rest. Heavy eyelids suggest a reduction in the driver's ability to keep their eyes open and focused on the road, which can lead to a higher risk of accidents. Additionally, difficulty concentrating means that the driver may struggle to process information effectively, making it challenging to react to changes in the driving environment or to respond promptly to hazards.

In contrast, the other options highlight responses that are not associated with fatigue. For example, increased speed might suggest heightened energy or aggression, rather than fatigue. Heightened alertness is the opposite of the state experienced when one is fatigued, and frequent lane changes could indicate distraction or recklessness, rather than the signs of fatigue which typically manifest in more subdued and uncoordinated behaviors. Recognizing the signs of driver fatigue is crucial for maintaining safety on the road.