If police discover the presence of a controlled substance in an individual's car during a routine traffic stop, then the person could be arrested on drug related charges. Depending on the type and amount of drugs found by police, the drug charges could range from minor to serious.
Typically, when police discover a large amount of drugs, they will try to elevate the charges from simple possession to full-blown drug trafficking or drug distribution. Such elevated drug charges must be taken seriously because they could result in years behind bars if the person is convicted of the allegations. Drug charges related to simple possession of a small amount of drugs could also land a person behind bars, but it is more likely that the person will face lesser punishments like probation or community service.