Why is knowing the legal limit for hours of service important?

Knowing the legal limit for hours of service is crucial because it directly relates to preventing driver fatigue, which is a significant factor in road safety. Fatigue can impair a driver's reaction times, decision-making abilities, and overall alertness, increasing the likelihood of accidents. By adhering to these regulations, drivers can ensure they are well-rested and capable of operating their vehicle safely, thus promoting not only their safety but also the safety of other road users.

While the other options may have some relevance in different contexts, they do not primarily address the core purpose of the hours of service regulations. Properly managing driving hours is fundamentally about maintaining alertness and capability behind the wheel, which is essential for safe driving practices.