Weed affects attention. Reportedly, accidents are twice as likely while stoned. Wait a few hours please! On the other hand, weed substitutes for alcohol. From

Weed affects attention. Reportedly, accidents are twice as likely while stoned. Wait a few hours please! On the other hand, weed substitutes for alcohol. From the paper http://www.iza.org/en/webcontent/publications/papers/viewAbstract?dp_id=6112 http://www.iza.org/en/webcontent/publications/papers/viewAbs... ... "According to authors D. Mark Anderson and Daniel I. Rees, the passage of medical marijuana laws in 16 states have also helped to reduce traffic deaths. Can that be right? Does weed really reduce the speed? The authors base their claim on statistics assembled using the the Fatality Analysis Reporting System, or FARS, which is a database collected by the National Highway Traffic Safety Administration. Across the 16 states where medical marijuana has been legalized, it was found that traffic fatalities dropped by as much as 9 percent. The FARS statistics do not prove that medical marijuana laws are the cause of the decrease in traffic deaths (such statistics can only provide correlation), but until now no research has been conducted to explain the relationship. Anderson and Rees offer up a couple of theories. First, they suggest that marijuana is a substitute for alcohol consumption. Basically, if medical marijuana laws create an uptick in marijuana use, then perhaps people are smoking grass rather than imbibing in the drink. This should, in turn, lead to less drunk driving, which explains the drop in traffic deaths."