The five common causes of drowsy driving accidents include insufficient sleep, prolonged continuous driving, monotonous driving environment, poor physical condition, and insufficient oxygen in the vehicle. Driving continuously for more than 4 hours without rest can cause muscle tension and mental exhaustion, especially on highways and other single-landscape roads where the lack of stimulation exacerbates fatigue. If the driver is suffering from an illness such as a cold or is in a state of hunger, the decline in physical functions will further reduce reaction speed. In addition, the oxygen concentration in the closed car compartment decreases with driving time, and the accumulation of carbon dioxide can cause headaches and drowsiness. It is best to rest every 2 hours, keep the car well-ventilated, avoid long-distance driving during physiological low periods such as the afternoon or early morning, and drink coffee to refresh oneself if necessary. However, the most effective way is still to stop in time for a short nap to ensure safety.
