DOES THE PASSAGE OF PROP 64 MEAN MORE HIGH DRIVERS ON THE ROAD?
Now that Prop 64 has passed, will we see more drivers under the influence on California roads? Maybe. But as I discussed in previous posts, unlike alcohol, there is no definitive way to test for the immediate presence of THC (the chemical in marijuana and marijuana derivatives that makes a person “high”) in a person’s system. Furthermore, while the DUI laws make it illegal to drive under the influence of marijuana, whether a driver is under the influence is a subjective assessment made by the detaining officer and unless the car is reeking of pot, the evidence may be difficult to prove in court. While science and the legislature are working on better testing and specific statutory limits, the state is currently in the predicament where recreational use of marijuana is legal, much like alcohol use, but the laws controlling driving under the influence of marijuana are ambiguous.
The critics of Prop 64 pointed out that the proposition does not include a DUI standard for marijuana. Colorado has, for example, included in their statute a driving under the influence of marijuana threshold of 5 nanograms of THC. Still, as I previously discussed, scientists have not come up with a device as accurate as a roadside breathalyzer and that is problematic. Colorado may lead the way though as the police there are now testing five types of oral fluid testers that allow the police to check a driver’s saliva for THC at the time of the traffic stop. And even though there is no threshold standard for marijuana in a driver’s system (similar to the .08% BAC in the DUI laws) at the present time, that does not mean the Legislature cannot enact a law with such a standard—and they most certainly will.


