What is the primary purpose of hours of service regulations for commercial drivers?

The primary purpose of hours of service regulations for commercial drivers is to limit the time spent driving. These regulations are designed to enhance safety by reducing driver fatigue, which can lead to accidents and impaired decision-making. By enforcing limits on driving hours and requiring rest periods, these regulations ensure that drivers are adequately rested before they get behind the wheel again. This ultimately aims to protect both the driver and the public on the road.