With the legalization of cannabis, many consumers face an important question: What are the rules regarding driving? What do I need to be aware of if I've smoked cannabis? The rules have recently changed, and there are a few things to keep in mind to stay safe on the road.
What is the current limit value?
Since August 22, 2024, a new legal THC limit of 3.5 nanograms per milliliter of blood serum has been in effect in Germany . This significantly raises the previous limit of 1.0 ng/ml, which was frequently used in legal proceedings. This limit allows drivers to operate vehicles with a certain residual level of THC in their blood without automatically facing penalties. According to experts, the new limit is roughly comparable to a blood alcohol limit of 0.2 per mille.
The new THC limit of 3.5 ng/ml means that cannabis users should not get behind the wheel immediately after smoking a joint. The time it takes to fall below this limit depends heavily on consumption patterns and varies from person to person and case to case. A general statement cannot be made here, similar to alcohol consumption.
How long do I have to wait?
- Occasional users : Those who only consume cannabis occasionally can often fall below the legal limit again within 6 to 12 hours . The amount consumed and the product (e.g., flower or edible) play a significant role here.
- Regular users : In these cases, THC can remain detectable in the blood for significantly longer. It is possible that even after several days , a higher THC level will still be present in the blood, as THC accumulates in fatty tissue.
What does the ADAC say?
The ADAC recommends waiting at least 24 hours after consumption before driving again, just to be on the safe side. However, this waiting period may be longer for regular users, as their metabolism slows down.
It remains important not only to pay attention to the THC level, but also to your own feelings: If you feel dizzy or not fully focused, you should definitely not drive, even if you are below the limit.
Are there differences based on age?
- Novice drivers and those under 21 must adhere to stricter rules: A THC ban in the blood remains in effect for them , similar to the alcohol ban for this group. This means that novice drivers can be penalized even with the lowest THC levels.
- Medical cannabis users are largely exempt from this regulation as long as they have a doctor's prescription and there are no signs of abuse.
What impact does consumption have on road traffic?
Despite the increased legal limit, driving under the influence of cannabis is not without its problems. THC can impair reaction time, coordination, and judgment. Driving above the legal limit can result in a fine of €500 and a one-month driving ban . If alcohol has also been consumed, the fine increases to €1,000.
How is the test conducted?
Police often begin with a urine test when cannabis use is suspected. If the urine test is positive, a blood test follows to determine the THC level in the blood serum. If this level exceeds 3.5 ng/ml, penalties may be imposed.
Are there any tips for dealing with traffic stops?
If you are stopped by the police, legal experts often give the following tips:
- Stay calm and cooperate . Submit your documents and only answer the necessary questions.
- No voluntary tests : You are not obligated to agree to a voluntary urine or saliva test. However, a blood test can be ordered and must then be carried out.
- No self-disclosure : You do not have to provide information about your consumption. Remain polite and state that you want to protect yourself legally.
What do current court rulings say?
Since the introduction of the new limit, several court rulings have already shown that the situation can be eased for consumers if they stay below the limit. However, an important exception remains for mixed use: if alcohol and cannabis are consumed together, harsher penalties apply.
Conclusion
Even though the THC limit is now more lenient, the recommendation remains: do not drive after consuming cannabis. Safety first – for you and other road users!
Stay informed and drive responsibly – don't smoke and drive! – Your Marry Jane Team
All statements without guarantee.
Note on language usage:
For the sake of readability, we have chosen not to use gender-inclusive language in our texts. However, all genders are always addressed equally. At Marry Jane, we place great value on inclusion and equality – everyone is welcome here, regardless of gender, identity, or origin.
