How long does cannabis and its degradation products remain detectable in urine?

Cannabis and its breakdown products stay detectable in urine for several weeks because they are stored in the body's fat tissue and released slowly over time. This means even after the effects have worn off, testing can still show positive results. In German traffic law, this is important because it means driving under the influence can be proven days or weeks after consumption, affecting fitness to drive and legal consequences. So, the rule of thumb is that cannabis use can impact driving eligibility long after use, not just during immediate intoxication.