California residents may be aware that the same amount of marijuana can affect individuals differently. The presence of THC in a person's blood stream can also be detected long after the drug's effects have worn off. These are a couple of the reasons why AAA wants to see an end to the legal blood-test threshold for THC that is used to convict people of impaired driving in some states.
AAA's safety foundation recently commissioned a study on the blood-test threshold for THC and whether it can reliably determine a driver's level of impairment. Currently, there are six states that allow marijuana use and employ these blood tests when drivers are suspected of being impaired. After the study was conducted, AAA recommended that states do away with specific THC threshold laws and instead allow police officers to screen drivers for physical signs of marijuana impairment.
The president and CEO of AAA stated that there is no scientific basis for setting a legal THC limit for drivers. Some drivers may be able to operate vehicles safely with relatively high levels of THC while other drivers cannot drive safely with a small amount of THC in their system. Another problem with the tests is that people who regularly use marijuana usually have some THC in their system even when they haven't used cannabis for a long time.
A criminal defense attorney may be able to represent a defendant who is facing the possibility of jail time for driving under the influence of marijuana. A lawyer may be able to look through all of the evidence to determine if a traffic stop was conducted legally as well as find out if the defendant's rights were encroached upon.