"But what we've found out is that as alcohol-impaired driving is going down, drug-impaired driving is going up."
Links
[1] http://www.usatoday.com/story/news/2015/06/23/marijuana-drivers/29155165/
[2] http://rethinkpot.org/tags/impaired
[3] http://rethinkpot.org/tags/driving
[4] http://rethinkpot.org/tags/car%2A
[5] http://rethinkpot.org/tags/today
[6] http://rethinkpot.org/tags/study