What is the key reason for the “12-hour rest rule” for CDL drivers?

The primary purpose of the “12-hour rest rule” for CDL drivers is to prevent fatigue and ensure safety on the road. This regulation is designed to address one of the significant risks associated with driving, which is drowsiness and diminished alertness over long periods. By requiring drivers to take adequate rest, the rule helps to maintain their physical and mental readiness to operate commercial vehicles safely. Fatigue can impair decision-making, reaction times, and overall attention, leading to an increased likelihood of accidents. Therefore, this rule is a critical component of promoting public safety and protecting both the drivers and other road users.

While vehicle maintenance, completing paperwork, and managing load distribution are important aspects of operating commercial vehicles, none of these addresses the primary concern of driver fatigue, which is the core focus of the 12-hour rest requirement.