What marijuana legalization did to car accident rates

6/26/17–Last week, a pair of studies came to seemingly opposite conclusions on whether rising marijuana use is causing an increase in car crashes in states that have legalized the drug. On the one hand, a finding that legalization led to a small but significant increase in crashes. On the other, a study concluding that legalization had no effect on fatal crashes at all. However, the two don’t necessarily contradict each other because the studies measured slightly different things. It seems plausible that legalization could lead to a slight increase in minor accidents that don’t prove fatal. Read