As per Washington laws, it is illegal to drive under the influence. Those driving with five nanograms of active THC (tetrahydrocannabinol) in their bloodstream are liable to be prosecuted.
The research team is seeking volunteers that are 21 years or older. The first step of the study will involve testing of blood and mouth swab of the volunteers who will then be asked to purchase marijuana from a licensed store.
The volunteers will then smoke the drug privately in their homes and will be picked up and brought to the hospital for secondary testing. Participants will also be encouraged to interact with local law enforcement officers and take a standard sobriety test conducted by them.