A 3-minute lesson from the Kansas course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Alcohol and other impairing drugs slow your brain, blur your eyes and stretch your reaction time. Impairment starts with the first drink, and only time, not coffee or a cold shower, sobers you up.
About 40%
Share of all fatal crashes that involve alcohol and other impairing drugs
Impairment starts with the first drink. With one or more drinks in the bloodstream you are visibly impaired and could be arrested for driving under the influence.
After four normal drinks at a party, a friend says a cup of coffee will fix things. It won't. At about one hour per drink, they should wait four hours or more, and the best choice is not to drive at all.
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.
Vision is measurably impacted starting at what BAC level, according to the handbook, for all drivers?
0.08 BAC
0.02 BAC
0.10 BAC
0.05 BAC
Answer: 0.02 BAC
The handbook states that vision is impacted at .02 BAC for all drivers, well below the legal limit for adults.
Alcohol and impairing drugs reduce a driver's ability to judge distance, speed, and movement primarily by affecting:
Balance
Muscle strength
Hearing
Vision
Answer: Vision
The handbook identifies vision as the most important sense for driving, and alcohol/drugs blur vision and slow the ability to focus, impairing judgment of distance and speed.