COLORADO HAS SHOWN REDUCED TRAFFIC FATALITIES SINCE LEGALIZATION from impaired drivers. This includes both Alcohol and Cannibis (which has also been shown to be less dangerous to drive on).     UP TO 25% REDUCED TRAFFIC FATALITIES.. 
This means that of the 4 candaians who die every single day in Canada from Impaired driving... ONE WOULD LIVE ONCE MARIJUANA IS LEGAL.. You could honestly say the Liberal Government is killing one Canadian per day by postponing legalization...   
DO DUE DILIGENCE - LOOK THIS UP... OVERALL DEATHS ARE DOWN by 25%.... 
You will also find fear-mongering articles saying marijuana road fatalities are up 100% (double)... This iis a bad statistic for two reasons.. First it has nothing to do with overall fatalities, and secondly Marijuana can be detected in victims two weeks after they are no longer stoned.
So when people have access to both booze and weed... Less people die on the roads..  

This would be a very important statistic for the Canadians who die.