Researchers conducted a study on car accidents in Virginia Beach during a 12 month period, ending in 2012. Sampling 3,000 accident-involved drivers, they found no evidence suggesting that those who contained marijuana in their system were more likely to be in an accident, according to the National Highway Traffic Safety Administration.
Researchers also controlled for factors like age and gender. Again, they found no evidence that marijuana increased their chances of an accident. Despite the fact that those who tested positive for marijuana were involved in more accidents, it was not because of the fact that they consumed marijuana, but from other factors. Regardless, users should not operate a vehicle while under the influence as it is known to impair and affect awareness, judgement, and reaction time.