A 2-minute lesson from the Indiana course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Alcohol and drugs slow your thinking, coordination, and reaction time. An impaired driver can turn a car into a lethal weapon, so learn the warning signs.
Know the rule
The likelihood of an accident increases when a driver is under the influence of drugs or alcohol. Alcohol harms clear thinking and physical coordination and decreases reaction time.
Many prescription, over-the-counter, and recreational drugs also impair reasoning and coordination. Check the label and discuss side effects with a physician or pharmacist before driving.
You took a new cold medicine that may cause drowsiness. Before driving, read the label and ask your pharmacist about side effects. Over-the-counter drugs can impair your reasoning and coordination just as alcohol can.
Check your understanding
Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.
Which of these is listed as a sign of an impaired driver?
Signaling well before turning
Making wide turns
Maintaining a constant, legal speed
Checking mirrors frequently
Answer: Making wide turns
A driver may be impaired if the vehicle makes wide turns.