Physical and mental fitness for driving are also essential. As the Ontario Ministry of Transportation’s website notes, drivers should not have any physical, mental, or emotional condition that could make it impossible to operate a vehicle safely, even if that condition is temporary. Driving while very happy, sad, or angry and be dangerous because strong emotions take attention away from the road and potential dangers. Injuries, illnesses, and other factors can hinder a driver’s ability to operate a vehicle safely, and it is important to avoid getting behind the wheel in these cases.