Teens who drank and smoked pot at the same time were 90 percent more likely to get a ticket and 50 percent more likely to be in a wreck.
Links
[1] http://www.philly.com/philly/health/topics/HealthDay687208_20140428_Pot-Booze_Combo_More_Dangerous_for_Teen_Drivers_Than_Alcohol_Alone.html#YBZ3fvHy1GkPLgEb.99
[2] http://rethinkpot.org/tags/car-accident%2A
[3] http://rethinkpot.org/tags/alcohol
[4] http://rethinkpot.org/tags/pot