A 3-minute lesson from the Michigan course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Marijuana may be legal for adults in Michigan, but driving while impaired by it is not. It distorts your sense of time, space and speed, and the penalties match those for alcohol.
Know the rule
Even where marijuana is legal for medicinal or recreational use, it is not legal, safe or wise to drive while impaired by it.
Officers judge impairment by your driving, their observations of you and your performance on field sobriety tests, and may request a chemical test when warranted.
You're 22, sober, with 2 ounces of marijuana in your trunk. That's legal. Smoke it in the car on a public road, or drive it across the Canadian border, and you're breaking the law.
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.
How much marijuana may a person 21 or older legally transport in a vehicle?
5 ounces or less
2.5 ounces or less
1 ounce or less
There is no legal limit
Answer: 2.5 ounces or less
It's legal to transport 2.5 ounces or less of marijuana if you're 21 or older.