I'll explain it in small words - you can move your lips while you read if it helps: traffic deaths were rising both before and after legalization; since legalization clearly didn't cause the former rise, there's no sound basis for claiming it caused the latter.
Name something that occurred in 2011 that resulted in traffic violations occurring. If you can't, you have no point.
In Colorado, Washington state and states that decriminalized marijuana, the pattern consistently shows traffic fatalities increasing after marijuana legalization/decriminalization.
Again, only idiot or liberal can't figure out -- more citizens intoxicated = more negligent deaths.
It's not suprising Reagan opposed drug and marijuana legalization while most prominent liberals today support legalizing marijuana.
But, someone has to lose their life because pot ends up being legalized, I pray it is someone that supported marijuana legalization.