Three people are dead, and this isn’t shocking to me. This is why I’m opposed to legal recreational marijuana. The American people seem to be growing more and more in favor of it, though, and ultimately we will see the long term consequences (good or bad).
CA has had defacto legalized pot for over 20 years. Yet it is one of the safer states in terms of highway deaths.
http://www.iihs.org/iihs/topics/t/general-statistics/fatalityfacts/state-by-state-overview/2016
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MJ laws have gotten looser nearly everywhere in the same time period, yet highway fatalities have fallen to historically low levels.
https://en.m.wikipedia.org/wiki/Motor_vehicle_fatality_rate_in_U.S._by_year
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That doesn’t mean looser pot laws are responsible for the increased safety, but it does make it hard to claim these laws have made the highways more dangerous.