Marijuana changes your coordination and perception. A driver who is high has a harder time staying in the right lane.
Marijuana slows your reaction time to road hazards like the sudden stopping of cars ahead, or another driver changing lanes.
Marijuana can cause hallucinations. A driver who is high might swerve to avoid something that is not even there and cause a crash.
You could be charged with impaired driving if you have been using marijuana. Specific evidence of direct possession or consumption of the actual drug is not required for a police officer to charge you.
