How soon is it safe to drive after smoking cannabis? California study aims to find out
As states legalize cannabis, the day-to-day challenges presented by lifting such bans need ironing out. One such problem is how long to wait before driving after lighting up.
It’s a question that researchers at the University of California San Diego (UCSD) aim to answer with a new study. And they’re inviting members of the public to help them find out.
Dr. Tom Marcotte, professor of psychiatry and co-director of the CMCR, told ABC15: "If you smoked this morning, are you impaired throughout the day? Are you impaired for a couple of hours? Or are you not impaired? We're trying to answer that.”
Compared with drink-driving, it is harder to pinpoint whether THC (the psychoactive ingredient in cannabis) can impact a person’s ability to drive as levels of the cannabinoid can be present in a user’s system but have no effect, said Marcotte.