More on my anti marijuana binge today

Driving After Marijuana Use Twice As Common As Driving After Drinking

Whitehill says, "There seems to be a misconception that marijuana use is
totally safe, but as an injury prevention researcher I dispute that.
We've done a good job in public health with messages about the risks of
driving after alcohol use. Clearly the idea not to drink and drive has
come through for these students, because we found only 7 percent engage
in that behavior. But our study suggests we must do better when it comes
to marijuana, since we found that 31 percent of marijuana-using
students drive under its influence."