Here in Colorado, one of the big issues since the legalization of marijuana has been to address the potential ramifications of marijuana use by drivers. This issue includes the problem of drugged driving as well as personal injury liability when a drugged driver causes an accident. The risk of marijuana-induced accidents has always been around, of course, but the concern is that the change in legal status could make the problem more prominent.
For employers, the issue is an important one, since they can open themselves up to liability if they hire employees who use marijuana on the job, not to mention increased insurance rates and potentially decreased productivity from workers, at least according to some. Exactly how this issue plays out in the future remains to be seen.