You must be in good physical and mental condition to drive. Don’t drive when you are sick or injured or when you have been drinking alcohol or taking any drug or medication that may reduce your ability to drive.
Don’t drive when you are tired. You might fall asleep at the wheel, risking the lives of others on the road. Even if you don’t fall asleep, fatigue affects your driving ability. Your thinking slows down and you miss seeing things. In an emergency, you may make the wrong decision or you may not make the right decision fast enough.
Don’t drive when you are upset or angry. Strong emotions can reduce your ability to think and react quickly.