Answer :
THC is the main psychoactive ingredient in marijuana. In Washington State, a driver who is at least 21 years old can be arrested for driving with a THC level of five nanograms per milliliter of blood or higher.
Consuming drugs and then driving can lead to accidents. The US government is very strict regarding the cases of drink and drive. Marijuana is a well known drug that is consumed by most of the people around the world. If a Police officer catches someone in suspicion of consumption of Marijuana, that person is sent for blood test. If the culprit refuses to cooperate by refusing to go for blood test, the license of that person is cancelled for some period of time. Usually in the blood tests the level of THC is checked as it is the main constituent in the drug and its presence declares that the person has consumed marijuana.
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