First, understand that driving while impaired or driving under the influence of any drug is typically charged at the highest tier under Pennsylvania’s 3-tier DUI system. Third tier DUIs are reserved for those drivers that have BAC of .16% and above or driving on any controlled substance. Your chances of overcoming a DUI involving marijuana depends heavily on the skill and experience of the defense lawyer you choose. Local laws and procedures vary widely in the commonwealth, but generally, your lawyer can: Examine the legality of your traffic stop for a potential motion to dismiss. Question whether procedural laws were followed in field testing, any searches and the arrest itself (suppression of evidence, dismissal) Challenge the validity of the chemical analysis performed at the lab (evidence inadmissible). Explain and underscore the inherent biases of chemical testing for cannabis to a jury (acquittal). Depending on the county where the offense is charged, there may be other defense strategies to explore. Your DUID lawyer should be able to communicate all available options to you after fully reviewing the case. Tibbott & Richardson 1040 Fifth Avenue, Fourth Floor Pittsburgh, PA 15219 (412) 444-7171 https://www.tibbottrichardson.com/