Radley Balko in the Washington Post has a fascinating blog piece this week about Colorado since marijuana legalization. Despite fears that legalization would result in carnage on the highways, so far traffic fatalities are near an all=time low.
From the article:
Here, the “high” bar (pardon the pun) is what you get when you add the worst January since 2002 to the worst February, to the worst March, and so on. The “low” bar is the sum total of the safest January, February, etc., since 2002. What’s notable here is that the totals so far in 2014 are closer to the safest composite year since 2002 than to the average year since 2002. I should also add here that these are total fatalities. If we were to calculate these figures as a rate — say, miles driven per fatality — the drop would be starker, both for this year and since Colorado legalized medical marijuana in 2001. While the number of miles Americans drive annually has leveled off nationally since the mid-2000s, the number of total miles traveled continues to go up in Colorado. If we were to measure by rate, then, the state would be at lows unseen in decades.
The figures are similar in states that have legalized medical marijuana. While some studies have shown that the number of drivers involved in fatal collisions who test positive for marijuana has steadily increased as pot has become more available, other studies have shown that overall traffic fatalities in those states have dropped. Again, because the pot tests only measure for recent pot use, not inebriation, there’s nothing inconsistent about those results.