In California, after how many hours of on-duty time is a driver not eligible to drive?

Answer: C — 80 hours or more in an 8-day period

In California, the federal regulations governing the hours of service for commercial drivers indicate that after a driver has accumulated 80 hours of on-duty time within an 8-day period, they are not eligible to drive. This limitation is in place to ensure that drivers do not become fatigued, which can significantly increase the risk of accidents. The 80-hour threshold is specifically designed to support safety on the road by mandating rest and preventing exhaustion. This regulation is critical for the safety of both the driver and others on the road, as driving while fatigued can impair reaction times and decision-making abilities. The choice reflecting the 80 hours in an 8-day period aligns with these safety regulations focused on managing driver fatigue effectively.