Yes: Does Legalization of Marijuana Increase Traffic Fatality Rates?

From JAMA Network:

By analyzing additional experimental states over a more recent time period, we have provided additional data that legalization of recreational marijuana is associated with increased traffic fatality rates. Applying these results to national driving statistics, nationwide legalization would be associated with 6800 (95% CI, 4200-9700) excess roadway deaths each year.

Source: Change in Traffic Fatality Rates in the First 4 States to Legalize Recreational Marijuana | Emergency Medicine | JAMA Internal Medicine | JAMA Network