ST. PAUL, Minn. (FOX 9) - Months after Minnesota legalized marijuana for adults, the state's Office of Traffic Safety is pilot testing products that aim to help law enforcement officers identify drivers who are high. "We're not looking to find somebody who used 10 days or 14 days ago. We're looking for somebody who used within the last couple of hours," said Mike Hanson, the … [Read more...] about Marijuana driver impairment test could be used in Minnesota