Marijuana and Driving

New Studies Confirm: Marijuana a Lesser Driving Hazard than Alcohol - Drug urine tests unjustified.

Review of accident studies shows marijuana not a major public highway safety hazard, refuting need for "zero-tolerance" DUI laws and bans on public use.
Nonetheless, study shows marijuana use is linked to increased injury risk, confirming California NORML's advice to users.
Expert review of drug tests and per se "driving under the influence" limits.