The Highway Loss Data Institute is claiming that their research suggests " Colorado, Oregon and Washington all saw increases in damage reports compared to other states."
But wait.....
"Other studies have found no significant effect in the number of crashes since the first three states legalized marijuana sales...."
Read more... http://www.govtech.com/public-safety/Why-the-Latest-Data-on-Marijuana-and-Car-Crashes-Has-Some-Experts-Skeptical.html