A quadrupling in the use of prescription drugs since 1999, and legalization of marijuana use in some states are cited among the reasons drug use has become an increasing threat to roadway safety, according to a report released today by the Governors Highway Safety Association, an organization of state highway safety officers.
Links
[1] https://www.washingtonpost.com/local/trafficandcommuting/drug-use-now-rivals-drunken-driving-as-cause-of-fatal-car-crashes-study-says/2015/09/29/fc139d6a-66a9-11e5-9223-70cb36460919_story.html
[2] http://www.rethinkpot.org/tags/car%2A
[3] http://www.rethinkpot.org/tags/fatalities