Is Marijuana to blame?

according to Highway Loss data institute, There was an increase in car accidents in Colorado, and some are wondering if Pot is to blame. there are quite a few questions on this. could the increase in accidents be tied into the population increase in colorado? could it be that i-25 has been an on going construction zone, from border to border, north to south. Marijuana has been around for years, there is no doubt it could be related, but before they throw Marijuana under the bus,  there needs to be more data on this.