What is one example of an incapacitating condition that would disqualify a driver?

Severe fatigue that interferes with safe driving is an example of an incapacitating condition that would disqualify a driver because it can significantly impair judgment, reaction time, and overall ability to operate a vehicle safely. The FMCSA guidelines emphasize that drivers must be fit to drive, meaning they should not have any condition that could prevent them from maintaining full control of the vehicle.

In contrast, minor allergies, common cold symptoms, and routine headaches typically do not reach the threshold of incapacitation outlined in these guidelines. While they may cause some discomfort, they are less likely to affect driving performance to the same detrimental extent as severe fatigue. The focus is on whether a condition prevents the driver from safely operating a vehicle, and in this case, severe fatigue poses a substantial risk.