>The rate of drivers who tested positive for THC did not change significantly before or after legalization (42.1% vs. 45.2%), indicating that legal status did not influence the behavior of those who chose to drive after use.

That being the case, I'm not sure what the policy prescription should be here, if any.

> 103 drivers (41.9%) overall tested positive for THC, with yearly rates ranging from 25.7% to 48.9%.

The statistics for this seem suspect at best, I'll believe it once it's peer reviewed