What should be monitored to enhance driving safety?

Monitoring personal fatigue and mental alertness is crucial for enhancing driving safety because these factors directly impact a driver's ability to operate a vehicle effectively. Fatigue can slow reaction times, impair judgment, and reduce attention to the road and surrounding environment, which significantly increases the risk of accidents. Similarly, mental alertness ensures that a driver can process information from their surroundings, make sound decisions, and respond quickly to unexpected situations.

While other factors, such as watching other drivers' speeds or being aware of visible traffic signs, are important aspects of safe driving, they do not address the personal responsibilities and readiness of the driver. Additionally, vehicle color and design have no bearing on driving safety; they might be visually appealing but do not affect the driver's performance or awareness. Therefore, personal well-being is the foundation of safe driving practices, making it essential to monitor fatigue and mental alertness consistently.