What does the DOT certification process help ensure about commercial drivers?

The DOT certification process primarily focuses on ensuring that commercial drivers meet necessary health standards for safe driving. This involves a thorough medical examination that assesses various health factors, including vision, hearing, cardiovascular health, and overall physical condition. The goal is to identify any medical issues that could impair a driver's ability to operate a vehicle safely and to ensure that only those who are fit to drive are granted a commercial driver's license.

While other options address important aspects of driving, such as technology, vehicle reliability, and training, they are not the primary focus of the DOT certification. The certification's main objective is to protect public safety by certifying that drivers do not have medical conditions that would disqualify them from safely operating commercial vehicles.