Driving under the influence of cannabis: How high is too high?

Driving under the influence of cannabis increases the risk of traffic accidents, but despite plenty of research into cannabis use by drivers, there is no consensus on deciding who is too high to drive
Is “a little high” too high to drive? The science is complicated
Rosemarie Mosteller/Alamy
Recreational cannabis use is on the rise around the world and so is the number of car accidents involving …